Define Java AST using hobgoblin

31 files changed, 789 insertions, 114 deletions

diff --git a/src/main/java/org/zwobble/hobgoblin/compiler/output/generators/javapreciselymatchers/JavaPreciselyMatchersGenerator.java b/src/main/java/org/zwobble/hobgoblin/compiler/output/generators/javapreciselymatchers/JavaPreciselyMatchersGenerator.java
index f592aa7..e1a9e38 100644
--- a/src/main/java/org/zwobble/hobgoblin/compiler/output/generators/javapreciselymatchers/JavaPreciselyMatchersGenerator.java
+++ b/src/main/java/org/zwobble/hobgoblin/compiler/output/generators/javapreciselymatchers/JavaPreciselyMatchersGenerator.java
@@ -250,7 +250,7 @@ public class JavaPreciselyMatchersGenerator implements Generator {
                 )
             ),
             methods,
-            JavaCustomArea.type(javaMatcherTypeRef, "body"),
+            JavaCustomArea.forType(javaMatcherTypeRef, "body"),
             DocComment.EMPTY
         );
     }
diff --git a/src/main/java/org/zwobble/hobgoblin/compiler/output/generators/javatypes/JavaTypesGenerator.java b/src/main/java/org/zwobble/hobgoblin/compiler/output/generators/javatypes/JavaTypesGenerator.java
index de33968..8f9ea13 100644
--- a/src/main/java/org/zwobble/hobgoblin/compiler/output/generators/javatypes/JavaTypesGenerator.java
+++ b/src/main/java/org/zwobble/hobgoblin/compiler/output/generators/javatypes/JavaTypesGenerator.java
@@ -101,11 +101,11 @@ public class JavaTypesGenerator implements Generator {
                                             Optional.empty()
                                         )
                                     ),
-                                    JavaCustomArea.type(generateBuilderTypeRef(sumDefinition.type()), "body"),
+                                    JavaCustomArea.forType(generateBuilderTypeRef(sumDefinition.type()), "body"),
                                     DocComment.EMPTY
                                 )
                             ),
-                            JavaCustomArea.type(generateTypeRef(sumDefinition.type(), context), "body"),
+                            JavaCustomArea.forType(generateTypeRef(sumDefinition.type(), context), "body"),
                             sumDefinition.docComment()
                         )
                     );
@@ -159,7 +159,7 @@ public class JavaTypesGenerator implements Generator {
                 ),
                 generateStructDefinitionBuilder(structDefinition, components, context)
             ),
-            JavaCustomArea.type(generateTypeRef(structDefinition.type(), context), "body"),
+            JavaCustomArea.forType(generateTypeRef(structDefinition.type(), context), "body"),
             structDefinition.docComment()
         );
     }
@@ -241,7 +241,7 @@ public class JavaTypesGenerator implements Generator {
             components,
             implementsTypes,
             body,
-            JavaCustomArea.type(builderJavaTypeRef, "body"),
+            JavaCustomArea.forType(builderJavaTypeRef, "body"),
             DocComment.EMPTY
         );
     }
diff --git a/src/main/java/org/zwobble/hobgoblin/compiler/output/lang/java/ast/JavaAssignment.java b/src/main/java/org/zwobble/hobgoblin/compiler/output/lang/java/ast/JavaAssignment.java
index b53e192..f17c9f3 100644
--- a/src/main/java/org/zwobble/hobgoblin/compiler/output/lang/java/ast/JavaAssignment.java
+++ b/src/main/java/org/zwobble/hobgoblin/compiler/output/lang/java/ast/JavaAssignment.java
@@ -1,7 +1,37 @@
+// Generated by hobgoblin.
+
 package org.zwobble.hobgoblin.compiler.output.lang.java.ast;
 
-public record JavaAssignment(
-    JavaExpression left,
-    JavaExpression right
-) implements JavaExpression {
+public record JavaAssignment(org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaExpression left, org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaExpression right) implements org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaExpression {
+    public static org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaAssignment.Builder arbitrary() {
+        return new org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaAssignment.Builder(org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaIntegerLiteral.arbitrary().build(), org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaIntegerLiteral.arbitrary().build());
+    }
+
+    public record Builder(org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaExpression left, org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaExpression right) implements org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaExpression.Builder {
+        public org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaAssignment build() {
+            return new org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaAssignment(left, right);
+        }
+
+        public org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaAssignment.Builder withLeft(org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaExpression left) {
+            return new org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaAssignment.Builder(left, right);
+        }
+
+        public org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaAssignment.Builder withLeft(org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaExpression.Builder left) {
+            return new org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaAssignment.Builder(left.build(), right);
+        }
+
+        public org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaAssignment.Builder withRight(org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaExpression right) {
+            return new org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaAssignment.Builder(left, right);
+        }
+
+        public org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaAssignment.Builder withRight(org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaExpression.Builder right) {
+            return new org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaAssignment.Builder(left, right.build());
+        }
+
+        // Custom area start: org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaAssignment.Builder body
+        // Custom area end: org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaAssignment.Builder body
+    }
+
+    // Custom area start: org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaAssignment body
+    // Custom area end: org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaAssignment body
 }
diff --git a/src/main/java/org/zwobble/hobgoblin/compiler/output/lang/java/ast/JavaBlock.java b/src/main/java/org/zwobble/hobgoblin/compiler/output/lang/java/ast/JavaBlock.java
index f758831..69747be 100644
--- a/src/main/java/org/zwobble/hobgoblin/compiler/output/lang/java/ast/JavaBlock.java
+++ b/src/main/java/org/zwobble/hobgoblin/compiler/output/lang/java/ast/JavaBlock.java
@@ -1,11 +1,30 @@
+// Generated by hobgoblin.
+
 package org.zwobble.hobgoblin.compiler.output.lang.java.ast;
 
-import java.util.List;
+public record JavaBlock(java.util.List<org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaBlockStatement> statements) {
+    public static org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaBlock.Builder arbitrary() {
+        return new org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaBlock.Builder(java.util.List.of());
+    }
+
+    public record Builder(java.util.List<org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaBlockStatement> statements) {
+        public org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaBlock build() {
+            return new org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaBlock(statements);
+        }
+
+        public org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaBlock.Builder withStatements(java.util.List<org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaBlockStatement> statements) {
+            return new org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaBlock.Builder(statements);
+        }
+
+        // Custom area start: org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaBlock.Builder body
+        // Custom area end: org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaBlock.Builder body
+    }
 
-public record JavaBlock(List<JavaBlockStatement> statements) {
-    public static final JavaBlock EMPTY = new JavaBlock(List.of());
+    // Custom area start: org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaBlock body
+    public static final JavaBlock EMPTY = new JavaBlock(java.util.List.of());
 
     public boolean isEmpty() {
         return this.statements.isEmpty();
     }
+    // Custom area end: org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaBlock body
 }
diff --git a/src/main/java/org/zwobble/hobgoblin/compiler/output/lang/java/ast/JavaBlockStatement.java b/src/main/java/org/zwobble/hobgoblin/compiler/output/lang/java/ast/JavaBlockStatement.java
index fe3e69a..19218f4 100644
--- a/src/main/java/org/zwobble/hobgoblin/compiler/output/lang/java/ast/JavaBlockStatement.java
+++ b/src/main/java/org/zwobble/hobgoblin/compiler/output/lang/java/ast/JavaBlockStatement.java
@@ -1,4 +1,15 @@
+// Generated by hobgoblin.
+
 package org.zwobble.hobgoblin.compiler.output.lang.java.ast;
 
-public sealed interface JavaBlockStatement permits JavaExpressionStatement, JavaReturn {
+public sealed interface JavaBlockStatement permits org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaExpressionStatement, org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaReturn {
+    public interface Builder {
+        public org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaBlockStatement build();
+
+        // Custom area start: org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaBlockStatement.Builder body
+        // Custom area end: org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaBlockStatement.Builder body
+    }
+
+    // Custom area start: org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaBlockStatement body
+    // Custom area end: org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaBlockStatement body
 }
diff --git a/src/main/java/org/zwobble/hobgoblin/compiler/output/lang/java/ast/JavaClassBodyDeclaration.java b/src/main/java/org/zwobble/hobgoblin/compiler/output/lang/java/ast/JavaClassBodyDeclaration.java
index 5ce363d..117bc72 100644
--- a/src/main/java/org/zwobble/hobgoblin/compiler/output/lang/java/ast/JavaClassBodyDeclaration.java
+++ b/src/main/java/org/zwobble/hobgoblin/compiler/output/lang/java/ast/JavaClassBodyDeclaration.java
@@ -1,4 +1,15 @@
+// Generated by hobgoblin.
+
 package org.zwobble.hobgoblin.compiler.output.lang.java.ast;
 
-public sealed interface JavaClassBodyDeclaration permits JavaConstructorDeclaration, JavaFieldDeclaration, JavaMethodDeclaration, JavaTypeDeclaration {
+public sealed interface JavaClassBodyDeclaration permits org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaClassDeclaration, org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaConstructorDeclaration, org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaFieldDeclaration, org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaInterfaceDeclaration, org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaMethodDeclaration, org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaRecordDeclaration {
+    public interface Builder {
+        public org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaClassBodyDeclaration build();
+
+        // Custom area start: org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaClassBodyDeclaration.Builder body
+        // Custom area end: org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaClassBodyDeclaration.Builder body
+    }
+
+    // Custom area start: org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaClassBodyDeclaration body
+    // Custom area end: org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaClassBodyDeclaration body
 }
diff --git a/src/main/java/org/zwobble/hobgoblin/compiler/output/lang/java/ast/JavaClassDeclaration.java b/src/main/java/org/zwobble/hobgoblin/compiler/output/lang/java/ast/JavaClassDeclaration.java
index 7a099ef..a05e2ed 100644
--- a/src/main/java/org/zwobble/hobgoblin/compiler/output/lang/java/ast/JavaClassDeclaration.java
+++ b/src/main/java/org/zwobble/hobgoblin/compiler/output/lang/java/ast/JavaClassDeclaration.java
@@ -1,14 +1,45 @@
+// Generated by hobgoblin.
+
 package org.zwobble.hobgoblin.compiler.output.lang.java.ast;
 
-import org.zwobble.hobgoblin.compiler.ast.DocComment;
+public record JavaClassDeclaration(String name, java.util.List<org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaTypeRef> implementsTypes, java.util.List<org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaClassBodyDeclaration> body, org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaCustomArea customArea, org.zwobble.hobgoblin.compiler.ast.DocComment docComment) implements org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaTypeDeclaration, org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaClassBodyDeclaration {
+    public static org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaClassDeclaration.Builder arbitrary() {
+        return new org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaClassDeclaration.Builder("", java.util.List.of(), java.util.List.of(), org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaCustomArea.arbitrary().build(), org.zwobble.hobgoblin.compiler.output.lang.java.ast.Native.arbitraryDocComment());
+    }
+
+    public record Builder(String name, java.util.List<org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaTypeRef> implementsTypes, java.util.List<org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaClassBodyDeclaration> body, org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaCustomArea customArea, org.zwobble.hobgoblin.compiler.ast.DocComment docComment) implements org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaTypeDeclaration.Builder, org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaClassBodyDeclaration.Builder {
+        public org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaClassDeclaration build() {
+            return new org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaClassDeclaration(name, implementsTypes, body, customArea, docComment);
+        }
+
+        public org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaClassDeclaration.Builder withName(String name) {
+            return new org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaClassDeclaration.Builder(name, implementsTypes, body, customArea, docComment);
+        }
+
+        public org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaClassDeclaration.Builder withImplementsTypes(java.util.List<org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaTypeRef> implementsTypes) {
+            return new org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaClassDeclaration.Builder(name, implementsTypes, body, customArea, docComment);
+        }
+
+        public org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaClassDeclaration.Builder withBody(java.util.List<org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaClassBodyDeclaration> body) {
+            return new org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaClassDeclaration.Builder(name, implementsTypes, body, customArea, docComment);
+        }
+
+        public org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaClassDeclaration.Builder withCustomArea(org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaCustomArea customArea) {
+            return new org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaClassDeclaration.Builder(name, implementsTypes, body, customArea, docComment);
+        }
+
+        public org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaClassDeclaration.Builder withCustomArea(org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaCustomArea.Builder customArea) {
+            return new org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaClassDeclaration.Builder(name, implementsTypes, body, customArea.build(), docComment);
+        }
+
+        public org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaClassDeclaration.Builder withDocComment(org.zwobble.hobgoblin.compiler.ast.DocComment docComment) {
+            return new org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaClassDeclaration.Builder(name, implementsTypes, body, customArea, docComment);
+        }
 
-import java.util.List;
+        // Custom area start: org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaClassDeclaration.Builder body
+        // Custom area end: org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaClassDeclaration.Builder body
+    }
 
-public record JavaClassDeclaration(
-    String name,
-    List<JavaTypeRef> implementsTypes,
-    List<JavaClassBodyDeclaration> body,
-    JavaCustomArea customArea,
-    DocComment docComment
-) implements JavaTypeDeclaration {
+    // Custom area start: org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaClassDeclaration body
+    // Custom area end: org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaClassDeclaration body
 }
diff --git a/src/main/java/org/zwobble/hobgoblin/compiler/output/lang/java/ast/JavaCompilationUnit.java b/src/main/java/org/zwobble/hobgoblin/compiler/output/lang/java/ast/JavaCompilationUnit.java
index ebcb316..252380c 100644
--- a/src/main/java/org/zwobble/hobgoblin/compiler/output/lang/java/ast/JavaCompilationUnit.java
+++ b/src/main/java/org/zwobble/hobgoblin/compiler/output/lang/java/ast/JavaCompilationUnit.java
@@ -1,9 +1,33 @@
+// Generated by hobgoblin.
+
 package org.zwobble.hobgoblin.compiler.output.lang.java.ast;
 
-import java.util.List;
+public record JavaCompilationUnit(java.util.List<String> packageName, org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaTypeDeclaration typeDeclaration) {
+    public static org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaCompilationUnit.Builder arbitrary() {
+        return new org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaCompilationUnit.Builder(java.util.List.of(), org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaClassDeclaration.arbitrary().build());
+    }
+
+    public record Builder(java.util.List<String> packageName, org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaTypeDeclaration typeDeclaration) {
+        public org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaCompilationUnit build() {
+            return new org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaCompilationUnit(packageName, typeDeclaration);
+        }
+
+        public org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaCompilationUnit.Builder withPackageName(java.util.List<String> packageName) {
+            return new org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaCompilationUnit.Builder(packageName, typeDeclaration);
+        }
+
+        public org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaCompilationUnit.Builder withTypeDeclaration(org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaTypeDeclaration typeDeclaration) {
+            return new org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaCompilationUnit.Builder(packageName, typeDeclaration);
+        }
+
+        public org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaCompilationUnit.Builder withTypeDeclaration(org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaTypeDeclaration.Builder typeDeclaration) {
+            return new org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaCompilationUnit.Builder(packageName, typeDeclaration.build());
+        }
+
+        // Custom area start: org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaCompilationUnit.Builder body
+        // Custom area end: org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaCompilationUnit.Builder body
+    }
 
-public record JavaCompilationUnit(
-    List<String> packageName,
-    JavaTypeDeclaration typeDeclaration
-) {
+    // Custom area start: org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaCompilationUnit body
+    // Custom area end: org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaCompilationUnit body
 }
diff --git a/src/main/java/org/zwobble/hobgoblin/compiler/output/lang/java/ast/JavaConstructorDeclaration.java b/src/main/java/org/zwobble/hobgoblin/compiler/output/lang/java/ast/JavaConstructorDeclaration.java
index a6799f8..b8898c7 100644
--- a/src/main/java/org/zwobble/hobgoblin/compiler/output/lang/java/ast/JavaConstructorDeclaration.java
+++ b/src/main/java/org/zwobble/hobgoblin/compiler/output/lang/java/ast/JavaConstructorDeclaration.java
@@ -1,11 +1,41 @@
+// Generated by hobgoblin.
+
 package org.zwobble.hobgoblin.compiler.output.lang.java.ast;
 
-import java.util.List;
+public record JavaConstructorDeclaration(String typeName, org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaVisibility visibility, java.util.List<org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaParam> params, org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaBlock body) implements org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaClassBodyDeclaration {
+    public static org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaConstructorDeclaration.Builder arbitrary() {
+        return new org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaConstructorDeclaration.Builder("", org.zwobble.hobgoblin.compiler.output.lang.java.ast.Native.arbitraryJavaVisibility(), java.util.List.of(), org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaBlock.arbitrary().build());
+    }
+
+    public record Builder(String typeName, org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaVisibility visibility, java.util.List<org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaParam> params, org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaBlock body) implements org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaClassBodyDeclaration.Builder {
+        public org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaConstructorDeclaration build() {
+            return new org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaConstructorDeclaration(typeName, visibility, params, body);
+        }
+
+        public org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaConstructorDeclaration.Builder withTypeName(String typeName) {
+            return new org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaConstructorDeclaration.Builder(typeName, visibility, params, body);
+        }
+
+        public org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaConstructorDeclaration.Builder withVisibility(org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaVisibility visibility) {
+            return new org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaConstructorDeclaration.Builder(typeName, visibility, params, body);
+        }
+
+        public org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaConstructorDeclaration.Builder withParams(java.util.List<org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaParam> params) {
+            return new org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaConstructorDeclaration.Builder(typeName, visibility, params, body);
+        }
+
+        public org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaConstructorDeclaration.Builder withBody(org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaBlock body) {
+            return new org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaConstructorDeclaration.Builder(typeName, visibility, params, body);
+        }
+
+        public org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaConstructorDeclaration.Builder withBody(org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaBlock.Builder body) {
+            return new org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaConstructorDeclaration.Builder(typeName, visibility, params, body.build());
+        }
+
+        // Custom area start: org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaConstructorDeclaration.Builder body
+        // Custom area end: org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaConstructorDeclaration.Builder body
+    }
 
-public record JavaConstructorDeclaration(
-    String typeName,
-    JavaVisibility visibility,
-    List<JavaParam> params,
-    JavaBlock body
-) implements JavaClassBodyDeclaration {
+    // Custom area start: org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaConstructorDeclaration body
+    // Custom area end: org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaConstructorDeclaration body
 }
diff --git a/src/main/java/org/zwobble/hobgoblin/compiler/output/lang/java/ast/JavaCustomArea.java b/src/main/java/org/zwobble/hobgoblin/compiler/output/lang/java/ast/JavaCustomArea.java
index 51e3096..f035a4f 100644
--- a/src/main/java/org/zwobble/hobgoblin/compiler/output/lang/java/ast/JavaCustomArea.java
+++ b/src/main/java/org/zwobble/hobgoblin/compiler/output/lang/java/ast/JavaCustomArea.java
@@ -1,7 +1,32 @@
+// Generated by hobgoblin.
+
 package org.zwobble.hobgoblin.compiler.output.lang.java.ast;
 
-public record JavaCustomArea(JavaTypeRef type, String name) {
-    public static JavaCustomArea type(JavaTypeRef type, String name) {
+public record JavaCustomArea(org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaTypeRef type, String name) {
+    public static org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaCustomArea.Builder arbitrary() {
+        return new org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaCustomArea.Builder(org.zwobble.hobgoblin.compiler.output.lang.java.ast.Native.arbitraryJavaTypeRef(), "");
+    }
+
+    public record Builder(org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaTypeRef type, String name) {
+        public org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaCustomArea build() {
+            return new org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaCustomArea(type, name);
+        }
+
+        public org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaCustomArea.Builder withType(org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaTypeRef type) {
+            return new org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaCustomArea.Builder(type, name);
+        }
+
+        public org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaCustomArea.Builder withName(String name) {
+            return new org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaCustomArea.Builder(type, name);
+        }
+
+        // Custom area start: org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaCustomArea.Builder body
+        // Custom area end: org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaCustomArea.Builder body
+    }
+
+    // Custom area start: org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaCustomArea body
+    public static JavaCustomArea forType(JavaTypeRef type, String name) {
         return new JavaCustomArea(type, name);
     }
+    // Custom area end: org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaCustomArea body
 }
diff --git a/src/main/java/org/zwobble/hobgoblin/compiler/output/lang/java/ast/JavaExpression.java b/src/main/java/org/zwobble/hobgoblin/compiler/output/lang/java/ast/JavaExpression.java
index 289b3e0..dae488d 100644
--- a/src/main/java/org/zwobble/hobgoblin/compiler/output/lang/java/ast/JavaExpression.java
+++ b/src/main/java/org/zwobble/hobgoblin/compiler/output/lang/java/ast/JavaExpression.java
@@ -1,4 +1,15 @@
+// Generated by hobgoblin.
+
 package org.zwobble.hobgoblin.compiler.output.lang.java.ast;
 
-public sealed interface JavaExpression permits JavaAssignment, JavaFieldAccess, JavaIntegerLiteral, JavaMethodCall, JavaMethodRef, JavaNewExpression, JavaNullLiteral, JavaRef, JavaStaticFieldAccess, JavaStaticMethodCall, JavaStringLiteral {
+public sealed interface JavaExpression permits org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaAssignment, org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaFieldAccess, org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaIntegerLiteral, org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaMethodCall, org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaMethodRef, org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaNewExpression, org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaNullLiteral, org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaRef, org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaStaticFieldAccess, org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaStaticMethodCall, org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaStringLiteral {
+    public interface Builder {
+        public org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaExpression build();
+
+        // Custom area start: org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaExpression.Builder body
+        // Custom area end: org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaExpression.Builder body
+    }
+
+    // Custom area start: org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaExpression body
+    // Custom area end: org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaExpression body
 }
diff --git a/src/main/java/org/zwobble/hobgoblin/compiler/output/lang/java/ast/JavaExpressionStatement.java b/src/main/java/org/zwobble/hobgoblin/compiler/output/lang/java/ast/JavaExpressionStatement.java
index 2ec771f..7ae1cd4 100644
--- a/src/main/java/org/zwobble/hobgoblin/compiler/output/lang/java/ast/JavaExpressionStatement.java
+++ b/src/main/java/org/zwobble/hobgoblin/compiler/output/lang/java/ast/JavaExpressionStatement.java
@@ -1,4 +1,29 @@
+// Generated by hobgoblin.
+
 package org.zwobble.hobgoblin.compiler.output.lang.java.ast;
 
-public record JavaExpressionStatement(JavaExpression expression) implements JavaBlockStatement {
+public record JavaExpressionStatement(org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaExpression expression) implements org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaBlockStatement {
+    public static org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaExpressionStatement.Builder arbitrary() {
+        return new org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaExpressionStatement.Builder(org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaIntegerLiteral.arbitrary().build());
+    }
+
+    public record Builder(org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaExpression expression) implements org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaBlockStatement.Builder {
+        public org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaExpressionStatement build() {
+            return new org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaExpressionStatement(expression);
+        }
+
+        public org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaExpressionStatement.Builder withExpression(org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaExpression expression) {
+            return new org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaExpressionStatement.Builder(expression);
+        }
+
+        public org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaExpressionStatement.Builder withExpression(org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaExpression.Builder expression) {
+            return new org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaExpressionStatement.Builder(expression.build());
+        }
+
+        // Custom area start: org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaExpressionStatement.Builder body
+        // Custom area end: org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaExpressionStatement.Builder body
+    }
+
+    // Custom area start: org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaExpressionStatement body
+    // Custom area end: org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaExpressionStatement body
 }
diff --git a/src/main/java/org/zwobble/hobgoblin/compiler/output/lang/java/ast/JavaFieldAccess.java b/src/main/java/org/zwobble/hobgoblin/compiler/output/lang/java/ast/JavaFieldAccess.java
index e213121..3ae942a 100644
--- a/src/main/java/org/zwobble/hobgoblin/compiler/output/lang/java/ast/JavaFieldAccess.java
+++ b/src/main/java/org/zwobble/hobgoblin/compiler/output/lang/java/ast/JavaFieldAccess.java
@@ -1,7 +1,33 @@
+// Generated by hobgoblin.
+
 package org.zwobble.hobgoblin.compiler.output.lang.java.ast;
 
-public record JavaFieldAccess(
-    JavaExpression receiver,
-    String fieldName
-) implements JavaExpression {
+public record JavaFieldAccess(org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaExpression receiver, String fieldName) implements org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaExpression {
+    public static org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaFieldAccess.Builder arbitrary() {
+        return new org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaFieldAccess.Builder(org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaIntegerLiteral.arbitrary().build(), "");
+    }
+
+    public record Builder(org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaExpression receiver, String fieldName) implements org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaExpression.Builder {
+        public org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaFieldAccess build() {
+            return new org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaFieldAccess(receiver, fieldName);
+        }
+
+        public org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaFieldAccess.Builder withReceiver(org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaExpression receiver) {
+            return new org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaFieldAccess.Builder(receiver, fieldName);
+        }
+
+        public org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaFieldAccess.Builder withReceiver(org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaExpression.Builder receiver) {
+            return new org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaFieldAccess.Builder(receiver.build(), fieldName);
+        }
+
+        public org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaFieldAccess.Builder withFieldName(String fieldName) {
+            return new org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaFieldAccess.Builder(receiver, fieldName);
+        }
+
+        // Custom area start: org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaFieldAccess.Builder body
+        // Custom area end: org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaFieldAccess.Builder body
+    }
+
+    // Custom area start: org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaFieldAccess body
+    // Custom area end: org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaFieldAccess body
 }
diff --git a/src/main/java/org/zwobble/hobgoblin/compiler/output/lang/java/ast/JavaFieldDeclaration.java b/src/main/java/org/zwobble/hobgoblin/compiler/output/lang/java/ast/JavaFieldDeclaration.java
index 14855de..81f26ea 100644
--- a/src/main/java/org/zwobble/hobgoblin/compiler/output/lang/java/ast/JavaFieldDeclaration.java
+++ b/src/main/java/org/zwobble/hobgoblin/compiler/output/lang/java/ast/JavaFieldDeclaration.java
@@ -1,8 +1,33 @@
+// Generated by hobgoblin.
+
 package org.zwobble.hobgoblin.compiler.output.lang.java.ast;
 
-public record JavaFieldDeclaration(
-    JavaVisibility visibility,
-    JavaTypeRef type,
-    String name
-) implements JavaClassBodyDeclaration {
+public record JavaFieldDeclaration(org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaVisibility visibility, org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaTypeRef type, String name) implements org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaClassBodyDeclaration {
+    public static org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaFieldDeclaration.Builder arbitrary() {
+        return new org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaFieldDeclaration.Builder(org.zwobble.hobgoblin.compiler.output.lang.java.ast.Native.arbitraryJavaVisibility(), org.zwobble.hobgoblin.compiler.output.lang.java.ast.Native.arbitraryJavaTypeRef(), "");
+    }
+
+    public record Builder(org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaVisibility visibility, org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaTypeRef type, String name) implements org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaClassBodyDeclaration.Builder {
+        public org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaFieldDeclaration build() {
+            return new org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaFieldDeclaration(visibility, type, name);
+        }
+
+        public org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaFieldDeclaration.Builder withVisibility(org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaVisibility visibility) {
+            return new org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaFieldDeclaration.Builder(visibility, type, name);
+        }
+
+        public org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaFieldDeclaration.Builder withType(org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaTypeRef type) {
+            return new org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaFieldDeclaration.Builder(visibility, type, name);
+        }
+
+        public org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaFieldDeclaration.Builder withName(String name) {
+            return new org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaFieldDeclaration.Builder(visibility, type, name);
+        }
+
+        // Custom area start: org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaFieldDeclaration.Builder body
+        // Custom area end: org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaFieldDeclaration.Builder body
+    }
+
+    // Custom area start: org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaFieldDeclaration body
+    // Custom area end: org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaFieldDeclaration body
 }
diff --git a/src/main/java/org/zwobble/hobgoblin/compiler/output/lang/java/ast/JavaIntegerLiteral.java b/src/main/java/org/zwobble/hobgoblin/compiler/output/lang/java/ast/JavaIntegerLiteral.java
index 0f0342d..575d8eb 100644
--- a/src/main/java/org/zwobble/hobgoblin/compiler/output/lang/java/ast/JavaIntegerLiteral.java
+++ b/src/main/java/org/zwobble/hobgoblin/compiler/output/lang/java/ast/JavaIntegerLiteral.java
@@ -1,4 +1,25 @@
+// Generated by hobgoblin.
+
 package org.zwobble.hobgoblin.compiler.output.lang.java.ast;
 
-public record JavaIntegerLiteral(long value) implements JavaExpression {
+public record JavaIntegerLiteral(long value) implements org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaExpression {
+    public static org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaIntegerLiteral.Builder arbitrary() {
+        return new org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaIntegerLiteral.Builder(0);
+    }
+
+    public record Builder(long value) implements org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaExpression.Builder {
+        public org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaIntegerLiteral build() {
+            return new org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaIntegerLiteral(value);
+        }
+
+        public org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaIntegerLiteral.Builder withValue(long value) {
+            return new org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaIntegerLiteral.Builder(value);
+        }
+
+        // Custom area start: org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaIntegerLiteral.Builder body
+        // Custom area end: org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaIntegerLiteral.Builder body
+    }
+
+    // Custom area start: org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaIntegerLiteral body
+    // Custom area end: org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaIntegerLiteral body
 }
diff --git a/src/main/java/org/zwobble/hobgoblin/compiler/output/lang/java/ast/JavaInterfaceDeclaration.java b/src/main/java/org/zwobble/hobgoblin/compiler/output/lang/java/ast/JavaInterfaceDeclaration.java
index e3780c7..8e9fc6b 100644
--- a/src/main/java/org/zwobble/hobgoblin/compiler/output/lang/java/ast/JavaInterfaceDeclaration.java
+++ b/src/main/java/org/zwobble/hobgoblin/compiler/output/lang/java/ast/JavaInterfaceDeclaration.java
@@ -1,15 +1,49 @@
+// Generated by hobgoblin.
+
 package org.zwobble.hobgoblin.compiler.output.lang.java.ast;
 
-import org.zwobble.hobgoblin.compiler.ast.DocComment;
+public record JavaInterfaceDeclaration(String name, org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaInterfaceOpenness openness, java.util.List<org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaTypeRef> permitsTypes, java.util.List<org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaClassBodyDeclaration> body, org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaCustomArea customArea, org.zwobble.hobgoblin.compiler.ast.DocComment docComment) implements org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaTypeDeclaration, org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaClassBodyDeclaration {
+    public static org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaInterfaceDeclaration.Builder arbitrary() {
+        return new org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaInterfaceDeclaration.Builder("", org.zwobble.hobgoblin.compiler.output.lang.java.ast.Native.arbitraryJavaInterfaceOpenness(), java.util.List.of(), java.util.List.of(), org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaCustomArea.arbitrary().build(), org.zwobble.hobgoblin.compiler.output.lang.java.ast.Native.arbitraryDocComment());
+    }
+
+    public record Builder(String name, org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaInterfaceOpenness openness, java.util.List<org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaTypeRef> permitsTypes, java.util.List<org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaClassBodyDeclaration> body, org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaCustomArea customArea, org.zwobble.hobgoblin.compiler.ast.DocComment docComment) implements org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaTypeDeclaration.Builder, org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaClassBodyDeclaration.Builder {
+        public org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaInterfaceDeclaration build() {
+            return new org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaInterfaceDeclaration(name, openness, permitsTypes, body, customArea, docComment);
+        }
+
+        public org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaInterfaceDeclaration.Builder withName(String name) {
+            return new org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaInterfaceDeclaration.Builder(name, openness, permitsTypes, body, customArea, docComment);
+        }
+
+        public org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaInterfaceDeclaration.Builder withOpenness(org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaInterfaceOpenness openness) {
+            return new org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaInterfaceDeclaration.Builder(name, openness, permitsTypes, body, customArea, docComment);
+        }
+
+        public org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaInterfaceDeclaration.Builder withPermitsTypes(java.util.List<org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaTypeRef> permitsTypes) {
+            return new org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaInterfaceDeclaration.Builder(name, openness, permitsTypes, body, customArea, docComment);
+        }
+
+        public org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaInterfaceDeclaration.Builder withBody(java.util.List<org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaClassBodyDeclaration> body) {
+            return new org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaInterfaceDeclaration.Builder(name, openness, permitsTypes, body, customArea, docComment);
+        }
+
+        public org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaInterfaceDeclaration.Builder withCustomArea(org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaCustomArea customArea) {
+            return new org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaInterfaceDeclaration.Builder(name, openness, permitsTypes, body, customArea, docComment);
+        }
+
+        public org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaInterfaceDeclaration.Builder withCustomArea(org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaCustomArea.Builder customArea) {
+            return new org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaInterfaceDeclaration.Builder(name, openness, permitsTypes, body, customArea.build(), docComment);
+        }
+
+        public org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaInterfaceDeclaration.Builder withDocComment(org.zwobble.hobgoblin.compiler.ast.DocComment docComment) {
+            return new org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaInterfaceDeclaration.Builder(name, openness, permitsTypes, body, customArea, docComment);
+        }
 
-import java.util.List;
+        // Custom area start: org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaInterfaceDeclaration.Builder body
+        // Custom area end: org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaInterfaceDeclaration.Builder body
+    }
 
-public record JavaInterfaceDeclaration(
-    String name,
-    JavaInterfaceOpenness openness,
-    List<JavaTypeRef> permitsTypes,
-    List<JavaClassBodyDeclaration> body,
-    JavaCustomArea customArea,
-    DocComment docComment
-) implements JavaTypeDeclaration {
+    // Custom area start: org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaInterfaceDeclaration body
+    // Custom area end: org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaInterfaceDeclaration body
 }
diff --git a/src/main/java/org/zwobble/hobgoblin/compiler/output/lang/java/ast/JavaMethodCall.java b/src/main/java/org/zwobble/hobgoblin/compiler/output/lang/java/ast/JavaMethodCall.java
index 6ec7caf..24841c3 100644
--- a/src/main/java/org/zwobble/hobgoblin/compiler/output/lang/java/ast/JavaMethodCall.java
+++ b/src/main/java/org/zwobble/hobgoblin/compiler/output/lang/java/ast/JavaMethodCall.java
@@ -1,10 +1,37 @@
+// Generated by hobgoblin.
+
 package org.zwobble.hobgoblin.compiler.output.lang.java.ast;
 
-import java.util.List;
+public record JavaMethodCall(org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaExpression receiver, String methodName, java.util.List<org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaExpression> args) implements org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaExpression {
+    public static org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaMethodCall.Builder arbitrary() {
+        return new org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaMethodCall.Builder(org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaIntegerLiteral.arbitrary().build(), "", java.util.List.of());
+    }
+
+    public record Builder(org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaExpression receiver, String methodName, java.util.List<org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaExpression> args) implements org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaExpression.Builder {
+        public org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaMethodCall build() {
+            return new org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaMethodCall(receiver, methodName, args);
+        }
+
+        public org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaMethodCall.Builder withReceiver(org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaExpression receiver) {
+            return new org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaMethodCall.Builder(receiver, methodName, args);
+        }
+
+        public org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaMethodCall.Builder withReceiver(org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaExpression.Builder receiver) {
+            return new org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaMethodCall.Builder(receiver.build(), methodName, args);
+        }
+
+        public org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaMethodCall.Builder withMethodName(String methodName) {
+            return new org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaMethodCall.Builder(receiver, methodName, args);
+        }
+
+        public org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaMethodCall.Builder withArgs(java.util.List<org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaExpression> args) {
+            return new org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaMethodCall.Builder(receiver, methodName, args);
+        }
+
+        // Custom area start: org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaMethodCall.Builder body
+        // Custom area end: org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaMethodCall.Builder body
+    }
 
-public record JavaMethodCall(
-    JavaExpression receiver,
-    String methodName,
-    List<JavaExpression> args
-) implements JavaExpression {
+    // Custom area start: org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaMethodCall body
+    // Custom area end: org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaMethodCall body
 }
diff --git a/src/main/java/org/zwobble/hobgoblin/compiler/output/lang/java/ast/JavaMethodDeclaration.java b/src/main/java/org/zwobble/hobgoblin/compiler/output/lang/java/ast/JavaMethodDeclaration.java
index dc5954c..b6b5043 100644
--- a/src/main/java/org/zwobble/hobgoblin/compiler/output/lang/java/ast/JavaMethodDeclaration.java
+++ b/src/main/java/org/zwobble/hobgoblin/compiler/output/lang/java/ast/JavaMethodDeclaration.java
@@ -1,22 +1,52 @@
+// Generated by hobgoblin.
+
 package org.zwobble.hobgoblin.compiler.output.lang.java.ast;
 
-import java.util.List;
-import java.util.Optional;
-
-public record JavaMethodDeclaration(
-    String name,
-    JavaVisibility visibility,
-    JavaMethodKind kind,
-    JavaTypeRef returnType,
-    List<JavaParam> params,
-    Optional<JavaBlock> body
-) implements JavaClassBodyDeclaration {
+public record JavaMethodDeclaration(String name, org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaVisibility visibility, org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaMethodKind kind, org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaTypeRef returnType, java.util.List<org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaParam> params, java.util.Optional<org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaBlock> body) implements org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaClassBodyDeclaration {
+    public static org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaMethodDeclaration.Builder arbitrary() {
+        return new org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaMethodDeclaration.Builder("", org.zwobble.hobgoblin.compiler.output.lang.java.ast.Native.arbitraryJavaVisibility(), org.zwobble.hobgoblin.compiler.output.lang.java.ast.Native.arbitraryJavaMethodKind(), org.zwobble.hobgoblin.compiler.output.lang.java.ast.Native.arbitraryJavaTypeRef(), java.util.List.of(), java.util.Optional.empty());
+    }
+
+    public record Builder(String name, org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaVisibility visibility, org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaMethodKind kind, org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaTypeRef returnType, java.util.List<org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaParam> params, java.util.Optional<org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaBlock> body) implements org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaClassBodyDeclaration.Builder {
+        public org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaMethodDeclaration build() {
+            return new org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaMethodDeclaration(name, visibility, kind, returnType, params, body);
+        }
+
+        public org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaMethodDeclaration.Builder withName(String name) {
+            return new org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaMethodDeclaration.Builder(name, visibility, kind, returnType, params, body);
+        }
+
+        public org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaMethodDeclaration.Builder withVisibility(org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaVisibility visibility) {
+            return new org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaMethodDeclaration.Builder(name, visibility, kind, returnType, params, body);
+        }
+
+        public org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaMethodDeclaration.Builder withKind(org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaMethodKind kind) {
+            return new org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaMethodDeclaration.Builder(name, visibility, kind, returnType, params, body);
+        }
+
+        public org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaMethodDeclaration.Builder withReturnType(org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaTypeRef returnType) {
+            return new org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaMethodDeclaration.Builder(name, visibility, kind, returnType, params, body);
+        }
+
+        public org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaMethodDeclaration.Builder withParams(java.util.List<org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaParam> params) {
+            return new org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaMethodDeclaration.Builder(name, visibility, kind, returnType, params, body);
+        }
+
+        public org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaMethodDeclaration.Builder withBody(java.util.Optional<org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaBlock> body) {
+            return new org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaMethodDeclaration.Builder(name, visibility, kind, returnType, params, body);
+        }
+
+        // Custom area start: org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaMethodDeclaration.Builder body
+        // Custom area end: org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaMethodDeclaration.Builder body
+    }
+
+    // Custom area start: org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaMethodDeclaration body
     public JavaMethodDeclaration(
         String name,
         JavaVisibility visibility,
         JavaMethodKind kind,
         JavaTypeRef returnType,
-        List<JavaParam> params,
+        java.util.List<JavaParam> params,
         JavaBlock body
     ) {
         this(
@@ -25,7 +55,8 @@ public record JavaMethodDeclaration(
             kind,
             returnType,
             params,
-            Optional.of(body)
+            java.util.Optional.of(body)
         );
     }
+    // Custom area end: org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaMethodDeclaration body
 }
diff --git a/src/main/java/org/zwobble/hobgoblin/compiler/output/lang/java/ast/JavaMethodRef.java b/src/main/java/org/zwobble/hobgoblin/compiler/output/lang/java/ast/JavaMethodRef.java
index b100804..b03fe15 100644
--- a/src/main/java/org/zwobble/hobgoblin/compiler/output/lang/java/ast/JavaMethodRef.java
+++ b/src/main/java/org/zwobble/hobgoblin/compiler/output/lang/java/ast/JavaMethodRef.java
@@ -1,4 +1,29 @@
+// Generated by hobgoblin.
+
 package org.zwobble.hobgoblin.compiler.output.lang.java.ast;
 
-public record JavaMethodRef(JavaTypeRef type, String methodName) implements JavaExpression {
+public record JavaMethodRef(org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaTypeRef type, String methodName) implements org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaExpression {
+    public static org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaMethodRef.Builder arbitrary() {
+        return new org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaMethodRef.Builder(org.zwobble.hobgoblin.compiler.output.lang.java.ast.Native.arbitraryJavaTypeRef(), "");
+    }
+
+    public record Builder(org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaTypeRef type, String methodName) implements org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaExpression.Builder {
+        public org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaMethodRef build() {
+            return new org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaMethodRef(type, methodName);
+        }
+
+        public org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaMethodRef.Builder withType(org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaTypeRef type) {
+            return new org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaMethodRef.Builder(type, methodName);
+        }
+
+        public org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaMethodRef.Builder withMethodName(String methodName) {
+            return new org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaMethodRef.Builder(type, methodName);
+        }
+
+        // Custom area start: org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaMethodRef.Builder body
+        // Custom area end: org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaMethodRef.Builder body
+    }
+
+    // Custom area start: org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaMethodRef body
+    // Custom area end: org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaMethodRef body
 }
diff --git a/src/main/java/org/zwobble/hobgoblin/compiler/output/lang/java/ast/JavaNewExpression.java b/src/main/java/org/zwobble/hobgoblin/compiler/output/lang/java/ast/JavaNewExpression.java
index b6852bf..b69f544 100644
--- a/src/main/java/org/zwobble/hobgoblin/compiler/output/lang/java/ast/JavaNewExpression.java
+++ b/src/main/java/org/zwobble/hobgoblin/compiler/output/lang/java/ast/JavaNewExpression.java
@@ -1,9 +1,29 @@
+// Generated by hobgoblin.
+
 package org.zwobble.hobgoblin.compiler.output.lang.java.ast;
 
-import java.util.List;
+public record JavaNewExpression(org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaTypeRef type, java.util.List<org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaExpression> args) implements org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaExpression {
+    public static org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaNewExpression.Builder arbitrary() {
+        return new org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaNewExpression.Builder(org.zwobble.hobgoblin.compiler.output.lang.java.ast.Native.arbitraryJavaTypeRef(), java.util.List.of());
+    }
+
+    public record Builder(org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaTypeRef type, java.util.List<org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaExpression> args) implements org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaExpression.Builder {
+        public org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaNewExpression build() {
+            return new org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaNewExpression(type, args);
+        }
+
+        public org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaNewExpression.Builder withType(org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaTypeRef type) {
+            return new org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaNewExpression.Builder(type, args);
+        }
+
+        public org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaNewExpression.Builder withArgs(java.util.List<org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaExpression> args) {
+            return new org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaNewExpression.Builder(type, args);
+        }
+
+        // Custom area start: org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaNewExpression.Builder body
+        // Custom area end: org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaNewExpression.Builder body
+    }
 
-public record JavaNewExpression(
-    JavaTypeRef type,
-    List<JavaExpression> args
-) implements JavaExpression {
+    // Custom area start: org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaNewExpression body
+    // Custom area end: org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaNewExpression body
 }
diff --git a/src/main/java/org/zwobble/hobgoblin/compiler/output/lang/java/ast/JavaNullLiteral.java b/src/main/java/org/zwobble/hobgoblin/compiler/output/lang/java/ast/JavaNullLiteral.java
index 3ce68eb..e0f11fd 100644
--- a/src/main/java/org/zwobble/hobgoblin/compiler/output/lang/java/ast/JavaNullLiteral.java
+++ b/src/main/java/org/zwobble/hobgoblin/compiler/output/lang/java/ast/JavaNullLiteral.java
@@ -1,4 +1,21 @@
+// Generated by hobgoblin.
+
 package org.zwobble.hobgoblin.compiler.output.lang.java.ast;
 
-public record JavaNullLiteral() implements JavaExpression {
+public record JavaNullLiteral() implements org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaExpression {
+    public static org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaNullLiteral.Builder arbitrary() {
+        return new org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaNullLiteral.Builder();
+    }
+
+    public record Builder() implements org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaExpression.Builder {
+        public org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaNullLiteral build() {
+            return new org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaNullLiteral();
+        }
+
+        // Custom area start: org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaNullLiteral.Builder body
+        // Custom area end: org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaNullLiteral.Builder body
+    }
+
+    // Custom area start: org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaNullLiteral body
+    // Custom area end: org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaNullLiteral body
 }
diff --git a/src/main/java/org/zwobble/hobgoblin/compiler/output/lang/java/ast/JavaParam.java b/src/main/java/org/zwobble/hobgoblin/compiler/output/lang/java/ast/JavaParam.java
index 49a7f5f..75c3534 100644
--- a/src/main/java/org/zwobble/hobgoblin/compiler/output/lang/java/ast/JavaParam.java
+++ b/src/main/java/org/zwobble/hobgoblin/compiler/output/lang/java/ast/JavaParam.java
@@ -1,7 +1,29 @@
+// Generated by hobgoblin.
+
 package org.zwobble.hobgoblin.compiler.output.lang.java.ast;
 
-public record JavaParam(
-    JavaTypeRef type,
-    String name
-) {
+public record JavaParam(org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaTypeRef type, String name) {
+    public static org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaParam.Builder arbitrary() {
+        return new org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaParam.Builder(org.zwobble.hobgoblin.compiler.output.lang.java.ast.Native.arbitraryJavaTypeRef(), "");
+    }
+
+    public record Builder(org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaTypeRef type, String name) {
+        public org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaParam build() {
+            return new org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaParam(type, name);
+        }
+
+        public org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaParam.Builder withType(org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaTypeRef type) {
+            return new org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaParam.Builder(type, name);
+        }
+
+        public org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaParam.Builder withName(String name) {
+            return new org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaParam.Builder(type, name);
+        }
+
+        // Custom area start: org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaParam.Builder body
+        // Custom area end: org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaParam.Builder body
+    }
+
+    // Custom area start: org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaParam body
+    // Custom area end: org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaParam body
 }
diff --git a/src/main/java/org/zwobble/hobgoblin/compiler/output/lang/java/ast/JavaRecordComponent.java b/src/main/java/org/zwobble/hobgoblin/compiler/output/lang/java/ast/JavaRecordComponent.java
index ba95357..e3bd593 100644
--- a/src/main/java/org/zwobble/hobgoblin/compiler/output/lang/java/ast/JavaRecordComponent.java
+++ b/src/main/java/org/zwobble/hobgoblin/compiler/output/lang/java/ast/JavaRecordComponent.java
@@ -1,4 +1,29 @@
+// Generated by hobgoblin.
+
 package org.zwobble.hobgoblin.compiler.output.lang.java.ast;
 
-public record JavaRecordComponent(JavaTypeRef type, String name) {
+public record JavaRecordComponent(org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaTypeRef type, String name) {
+    public static org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaRecordComponent.Builder arbitrary() {
+        return new org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaRecordComponent.Builder(org.zwobble.hobgoblin.compiler.output.lang.java.ast.Native.arbitraryJavaTypeRef(), "");
+    }
+
+    public record Builder(org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaTypeRef type, String name) {
+        public org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaRecordComponent build() {
+            return new org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaRecordComponent(type, name);
+        }
+
+        public org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaRecordComponent.Builder withType(org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaTypeRef type) {
+            return new org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaRecordComponent.Builder(type, name);
+        }
+
+        public org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaRecordComponent.Builder withName(String name) {
+            return new org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaRecordComponent.Builder(type, name);
+        }
+
+        // Custom area start: org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaRecordComponent.Builder body
+        // Custom area end: org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaRecordComponent.Builder body
+    }
+
+    // Custom area start: org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaRecordComponent body
+    // Custom area end: org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaRecordComponent body
 }
diff --git a/src/main/java/org/zwobble/hobgoblin/compiler/output/lang/java/ast/JavaRecordDeclaration.java b/src/main/java/org/zwobble/hobgoblin/compiler/output/lang/java/ast/JavaRecordDeclaration.java
index 709d889..45a3bcf 100644
--- a/src/main/java/org/zwobble/hobgoblin/compiler/output/lang/java/ast/JavaRecordDeclaration.java
+++ b/src/main/java/org/zwobble/hobgoblin/compiler/output/lang/java/ast/JavaRecordDeclaration.java
@@ -1,15 +1,49 @@
+// Generated by hobgoblin.
+
 package org.zwobble.hobgoblin.compiler.output.lang.java.ast;
 
-import org.zwobble.hobgoblin.compiler.ast.DocComment;
+public record JavaRecordDeclaration(String name, java.util.List<org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaRecordComponent> components, java.util.List<org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaTypeRef> implementsTypes, java.util.List<org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaClassBodyDeclaration> body, org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaCustomArea customArea, org.zwobble.hobgoblin.compiler.ast.DocComment docComment) implements org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaTypeDeclaration, org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaClassBodyDeclaration {
+    public static org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaRecordDeclaration.Builder arbitrary() {
+        return new org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaRecordDeclaration.Builder("", java.util.List.of(), java.util.List.of(), java.util.List.of(), org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaCustomArea.arbitrary().build(), org.zwobble.hobgoblin.compiler.output.lang.java.ast.Native.arbitraryDocComment());
+    }
+
+    public record Builder(String name, java.util.List<org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaRecordComponent> components, java.util.List<org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaTypeRef> implementsTypes, java.util.List<org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaClassBodyDeclaration> body, org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaCustomArea customArea, org.zwobble.hobgoblin.compiler.ast.DocComment docComment) implements org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaTypeDeclaration.Builder, org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaClassBodyDeclaration.Builder {
+        public org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaRecordDeclaration build() {
+            return new org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaRecordDeclaration(name, components, implementsTypes, body, customArea, docComment);
+        }
+
+        public org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaRecordDeclaration.Builder withName(String name) {
+            return new org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaRecordDeclaration.Builder(name, components, implementsTypes, body, customArea, docComment);
+        }
+
+        public org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaRecordDeclaration.Builder withComponents(java.util.List<org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaRecordComponent> components) {
+            return new org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaRecordDeclaration.Builder(name, components, implementsTypes, body, customArea, docComment);
+        }
+
+        public org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaRecordDeclaration.Builder withImplementsTypes(java.util.List<org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaTypeRef> implementsTypes) {
+            return new org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaRecordDeclaration.Builder(name, components, implementsTypes, body, customArea, docComment);
+        }
+
+        public org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaRecordDeclaration.Builder withBody(java.util.List<org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaClassBodyDeclaration> body) {
+            return new org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaRecordDeclaration.Builder(name, components, implementsTypes, body, customArea, docComment);
+        }
+
+        public org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaRecordDeclaration.Builder withCustomArea(org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaCustomArea customArea) {
+            return new org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaRecordDeclaration.Builder(name, components, implementsTypes, body, customArea, docComment);
+        }
+
+        public org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaRecordDeclaration.Builder withCustomArea(org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaCustomArea.Builder customArea) {
+            return new org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaRecordDeclaration.Builder(name, components, implementsTypes, body, customArea.build(), docComment);
+        }
+
+        public org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaRecordDeclaration.Builder withDocComment(org.zwobble.hobgoblin.compiler.ast.DocComment docComment) {
+            return new org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaRecordDeclaration.Builder(name, components, implementsTypes, body, customArea, docComment);
+        }
 
-import java.util.List;
+        // Custom area start: org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaRecordDeclaration.Builder body
+        // Custom area end: org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaRecordDeclaration.Builder body
+    }
 
-public record JavaRecordDeclaration(
-    String name,
-    List<JavaRecordComponent> components,
-    List<JavaTypeRef> implementsTypes,
-    List<JavaClassBodyDeclaration> body,
-    JavaCustomArea customArea,
-    DocComment docComment
-) implements JavaTypeDeclaration {
+    // Custom area start: org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaRecordDeclaration body
+    // Custom area end: org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaRecordDeclaration body
 }
diff --git a/src/main/java/org/zwobble/hobgoblin/compiler/output/lang/java/ast/JavaRef.java b/src/main/java/org/zwobble/hobgoblin/compiler/output/lang/java/ast/JavaRef.java
index 0ccc05c..36c1005 100644
--- a/src/main/java/org/zwobble/hobgoblin/compiler/output/lang/java/ast/JavaRef.java
+++ b/src/main/java/org/zwobble/hobgoblin/compiler/output/lang/java/ast/JavaRef.java
@@ -1,4 +1,25 @@
+// Generated by hobgoblin.
+
 package org.zwobble.hobgoblin.compiler.output.lang.java.ast;
 
-public record JavaRef(String name) implements JavaExpression {
+public record JavaRef(String name) implements org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaExpression {
+    public static org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaRef.Builder arbitrary() {
+        return new org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaRef.Builder("");
+    }
+
+    public record Builder(String name) implements org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaExpression.Builder {
+        public org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaRef build() {
+            return new org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaRef(name);
+        }
+
+        public org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaRef.Builder withName(String name) {
+            return new org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaRef.Builder(name);
+        }
+
+        // Custom area start: org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaRef.Builder body
+        // Custom area end: org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaRef.Builder body
+    }
+
+    // Custom area start: org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaRef body
+    // Custom area end: org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaRef body
 }
diff --git a/src/main/java/org/zwobble/hobgoblin/compiler/output/lang/java/ast/JavaReturn.java b/src/main/java/org/zwobble/hobgoblin/compiler/output/lang/java/ast/JavaReturn.java
index f297f33..7c5691c 100644
--- a/src/main/java/org/zwobble/hobgoblin/compiler/output/lang/java/ast/JavaReturn.java
+++ b/src/main/java/org/zwobble/hobgoblin/compiler/output/lang/java/ast/JavaReturn.java
@@ -1,4 +1,29 @@
+// Generated by hobgoblin.
+
 package org.zwobble.hobgoblin.compiler.output.lang.java.ast;
 
-public record JavaReturn(JavaExpression value) implements JavaBlockStatement {
+public record JavaReturn(org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaExpression value) implements org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaBlockStatement {
+    public static org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaReturn.Builder arbitrary() {
+        return new org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaReturn.Builder(org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaIntegerLiteral.arbitrary().build());
+    }
+
+    public record Builder(org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaExpression value) implements org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaBlockStatement.Builder {
+        public org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaReturn build() {
+            return new org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaReturn(value);
+        }
+
+        public org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaReturn.Builder withValue(org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaExpression value) {
+            return new org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaReturn.Builder(value);
+        }
+
+        public org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaReturn.Builder withValue(org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaExpression.Builder value) {
+            return new org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaReturn.Builder(value.build());
+        }
+
+        // Custom area start: org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaReturn.Builder body
+        // Custom area end: org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaReturn.Builder body
+    }
+
+    // Custom area start: org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaReturn body
+    // Custom area end: org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaReturn body
 }
diff --git a/src/main/java/org/zwobble/hobgoblin/compiler/output/lang/java/ast/JavaStaticFieldAccess.java b/src/main/java/org/zwobble/hobgoblin/compiler/output/lang/java/ast/JavaStaticFieldAccess.java
index 1a405d1..568a892 100644
--- a/src/main/java/org/zwobble/hobgoblin/compiler/output/lang/java/ast/JavaStaticFieldAccess.java
+++ b/src/main/java/org/zwobble/hobgoblin/compiler/output/lang/java/ast/JavaStaticFieldAccess.java
@@ -1,7 +1,29 @@
+// Generated by hobgoblin.
+
 package org.zwobble.hobgoblin.compiler.output.lang.java.ast;
 
-public record JavaStaticFieldAccess(
-    JavaTypeRef type,
-    String fieldName
-) implements JavaExpression {
+public record JavaStaticFieldAccess(org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaTypeRef type, String fieldName) implements org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaExpression {
+    public static org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaStaticFieldAccess.Builder arbitrary() {
+        return new org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaStaticFieldAccess.Builder(org.zwobble.hobgoblin.compiler.output.lang.java.ast.Native.arbitraryJavaTypeRef(), "");
+    }
+
+    public record Builder(org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaTypeRef type, String fieldName) implements org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaExpression.Builder {
+        public org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaStaticFieldAccess build() {
+            return new org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaStaticFieldAccess(type, fieldName);
+        }
+
+        public org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaStaticFieldAccess.Builder withType(org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaTypeRef type) {
+            return new org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaStaticFieldAccess.Builder(type, fieldName);
+        }
+
+        public org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaStaticFieldAccess.Builder withFieldName(String fieldName) {
+            return new org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaStaticFieldAccess.Builder(type, fieldName);
+        }
+
+        // Custom area start: org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaStaticFieldAccess.Builder body
+        // Custom area end: org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaStaticFieldAccess.Builder body
+    }
+
+    // Custom area start: org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaStaticFieldAccess body
+    // Custom area end: org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaStaticFieldAccess body
 }
diff --git a/src/main/java/org/zwobble/hobgoblin/compiler/output/lang/java/ast/JavaStaticMethodCall.java b/src/main/java/org/zwobble/hobgoblin/compiler/output/lang/java/ast/JavaStaticMethodCall.java
index ec12861..2a3283b 100644
--- a/src/main/java/org/zwobble/hobgoblin/compiler/output/lang/java/ast/JavaStaticMethodCall.java
+++ b/src/main/java/org/zwobble/hobgoblin/compiler/output/lang/java/ast/JavaStaticMethodCall.java
@@ -1,10 +1,33 @@
+// Generated by hobgoblin.
+
 package org.zwobble.hobgoblin.compiler.output.lang.java.ast;
 
-import java.util.List;
+public record JavaStaticMethodCall(org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaTypeRef type, String methodName, java.util.List<org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaExpression> args) implements org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaExpression {
+    public static org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaStaticMethodCall.Builder arbitrary() {
+        return new org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaStaticMethodCall.Builder(org.zwobble.hobgoblin.compiler.output.lang.java.ast.Native.arbitraryJavaTypeRef(), "", java.util.List.of());
+    }
+
+    public record Builder(org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaTypeRef type, String methodName, java.util.List<org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaExpression> args) implements org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaExpression.Builder {
+        public org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaStaticMethodCall build() {
+            return new org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaStaticMethodCall(type, methodName, args);
+        }
+
+        public org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaStaticMethodCall.Builder withType(org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaTypeRef type) {
+            return new org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaStaticMethodCall.Builder(type, methodName, args);
+        }
+
+        public org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaStaticMethodCall.Builder withMethodName(String methodName) {
+            return new org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaStaticMethodCall.Builder(type, methodName, args);
+        }
+
+        public org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaStaticMethodCall.Builder withArgs(java.util.List<org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaExpression> args) {
+            return new org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaStaticMethodCall.Builder(type, methodName, args);
+        }
+
+        // Custom area start: org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaStaticMethodCall.Builder body
+        // Custom area end: org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaStaticMethodCall.Builder body
+    }
 
-public record JavaStaticMethodCall(
-    JavaTypeRef type,
-    String methodName,
-    List<JavaExpression> args
-) implements JavaExpression {
+    // Custom area start: org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaStaticMethodCall body
+    // Custom area end: org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaStaticMethodCall body
 }
diff --git a/src/main/java/org/zwobble/hobgoblin/compiler/output/lang/java/ast/JavaStringLiteral.java b/src/main/java/org/zwobble/hobgoblin/compiler/output/lang/java/ast/JavaStringLiteral.java
index 28fc5d7..b97df72 100644
--- a/src/main/java/org/zwobble/hobgoblin/compiler/output/lang/java/ast/JavaStringLiteral.java
+++ b/src/main/java/org/zwobble/hobgoblin/compiler/output/lang/java/ast/JavaStringLiteral.java
@@ -1,4 +1,25 @@
+// Generated by hobgoblin.
+
 package org.zwobble.hobgoblin.compiler.output.lang.java.ast;
 
-public record JavaStringLiteral(String value) implements JavaExpression {
+public record JavaStringLiteral(String value) implements org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaExpression {
+    public static org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaStringLiteral.Builder arbitrary() {
+        return new org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaStringLiteral.Builder("");
+    }
+
+    public record Builder(String value) implements org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaExpression.Builder {
+        public org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaStringLiteral build() {
+            return new org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaStringLiteral(value);
+        }
+
+        public org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaStringLiteral.Builder withValue(String value) {
+            return new org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaStringLiteral.Builder(value);
+        }
+
+        // Custom area start: org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaStringLiteral.Builder body
+        // Custom area end: org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaStringLiteral.Builder body
+    }
+
+    // Custom area start: org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaStringLiteral body
+    // Custom area end: org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaStringLiteral body
 }
diff --git a/src/main/java/org/zwobble/hobgoblin/compiler/output/lang/java/ast/JavaTypeDeclaration.java b/src/main/java/org/zwobble/hobgoblin/compiler/output/lang/java/ast/JavaTypeDeclaration.java
index 0ad9dd2..1824efc 100644
--- a/src/main/java/org/zwobble/hobgoblin/compiler/output/lang/java/ast/JavaTypeDeclaration.java
+++ b/src/main/java/org/zwobble/hobgoblin/compiler/output/lang/java/ast/JavaTypeDeclaration.java
@@ -1,6 +1,17 @@
+// Generated by hobgoblin.
+
 package org.zwobble.hobgoblin.compiler.output.lang.java.ast;
 
-public sealed interface JavaTypeDeclaration extends JavaClassBodyDeclaration permits JavaClassDeclaration, JavaInterfaceDeclaration, JavaRecordDeclaration {
+public sealed interface JavaTypeDeclaration permits org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaClassDeclaration, org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaInterfaceDeclaration, org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaRecordDeclaration {
+    public interface Builder {
+        public org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaTypeDeclaration build();
+
+        // Custom area start: org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaTypeDeclaration.Builder body
+        // Custom area end: org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaTypeDeclaration.Builder body
+    }
+
+    // Custom area start: org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaTypeDeclaration body
     String name();
     JavaCustomArea customArea();
+    // Custom area end: org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaTypeDeclaration body
 }
diff --git a/src/main/java/org/zwobble/hobgoblin/compiler/output/lang/java/ast/Native.java b/src/main/java/org/zwobble/hobgoblin/compiler/output/lang/java/ast/Native.java
new file mode 100644
index 0000000..fd23901
--- /dev/null
+++ b/src/main/java/org/zwobble/hobgoblin/compiler/output/lang/java/ast/Native.java
@@ -0,0 +1,28 @@
+package org.zwobble.hobgoblin.compiler.output.lang.java.ast;
+
+import org.zwobble.hobgoblin.compiler.ast.DocComment;
+
+public class Native {
+    private Native() {
+    }
+
+    public static DocComment arbitraryDocComment() {
+        return DocComment.EMPTY;
+    }
+
+    public static JavaInterfaceOpenness arbitraryJavaInterfaceOpenness() {
+        return JavaInterfaceOpenness.OPEN;
+    }
+
+    public static JavaMethodKind arbitraryJavaMethodKind() {
+        return JavaMethodKind.INSTANCE;
+    }
+
+    public static JavaTypeRef arbitraryJavaTypeRef() {
+        return JavaTypeRef.INT;
+    }
+
+    public static JavaVisibility arbitraryJavaVisibility() {
+        return JavaVisibility.PRIVATE;
+    }
+}