Cobble together limited inner class support

1 files changed, 5 insertions, 0 deletions

diff --git a/src/main/java/org/zwobble/couscous/util/ExtraMaps.java b/src/main/java/org/zwobble/couscous/util/ExtraMaps.java
index 09339e6..55829cf 100644
--- a/src/main/java/org/zwobble/couscous/util/ExtraMaps.java
+++ b/src/main/java/org/zwobble/couscous/util/ExtraMaps.java
@@ -4,6 +4,7 @@ import com.google.common.collect.ImmutableMap;
 
 import java.util.AbstractMap;
 import java.util.Map;
+import java.util.Optional;
 import java.util.function.Function;
 
 public class ExtraMaps {
@@ -23,6 +24,10 @@ public class ExtraMaps {
         return ImmutableMap.of(key1, value1, key2, value2, key3, value3);
     }
 
+    public static <K, V> Optional<V> lookup(Map<K, V> map, K key) {
+        return Optional.ofNullable(map.get(key));
+    }
+
     public static <T, K, V> Map<K, V> toMap(Iterable<T> iterable, Function<T, Map.Entry<K, V>> function) {
         ImmutableMap.Builder<K, V> builder = ImmutableMap.builder();