diff --git a/src/builder/resources/speiger/assets/collections/templates/utils/maps/Maps.template b/src/builder/resources/speiger/assets/collections/templates/utils/maps/Maps.template
index a2ab0fd7..73e1078e 100644
--- a/src/builder/resources/speiger/assets/collections/templates/utils/maps/Maps.template
+++ b/src/builder/resources/speiger/assets/collections/templates/utils/maps/Maps.template
@@ -318,6 +318,18 @@ public class MAPS
 		@Override
 		public VALUE_TYPE getOrDefault(KEY_TYPE key, VALUE_TYPE defaultValue) { return EQUALS_KEY_TYPE(key, this.key) ? value : defaultValue; }
 #endif
+		@Override
+		public VALUE_TYPE COMPUTE(KEY_TYPE key, UNARY_OPERATOR KEY_VALUE_GENERIC_TYPE mappingFunction) { throw new UnsupportedOperationException(); }
+		@Override
+		public VALUE_TYPE COMPUTE_IF_ABSENT(KEY_TYPE key, FUNCTION KEY_VALUE_GENERIC_TYPE mappingFunction) { throw new UnsupportedOperationException(); }
+		@Override
+		public VALUE_TYPE COMPUTE_IF_PRESENT(KEY_TYPE key, UNARY_OPERATOR KEY_VALUE_GENERIC_TYPE mappingFunction) { throw new UnsupportedOperationException(); }
+		@Override
+		public VALUE_TYPE SUPPLY_IF_ABSENT(KEY_TYPE key, VALUE_SUPPLIER VALUE_GENERIC_TYPE valueProvider) { throw new UnsupportedOperationException(); }
+		@Override
+		public VALUE_TYPE MERGE(KEY_TYPE key, VALUE_TYPE value, VALUE_UNARY_OPERATOR VALUE_VALUE_GENERIC_TYPE mappingFunction) { throw new UnsupportedOperationException(); }
+		@Override
+		public void BULK_MERGE(MAP KEY_VALUE_GENERIC_TYPE m, VALUE_UNARY_OPERATOR VALUE_VALUE_GENERIC_TYPE mappingFunction) { throw new UnsupportedOperationException(); }
 		@Override
 		public SingletonMap KEY_VALUE_GENERIC_TYPE copy() { return new SingletonMapKV_BRACES(key, value); }
 		@Override
@@ -366,8 +378,20 @@ public class MAPS
 		public VALUE_TYPE GET_VALUE(KEY_TYPE key) { return getDefaultReturnValue(); }
 #if !TYPE_OBJECT || !VALUE_OBJECT
 		@Override
-		public VALUE_TYPE getOrDefault(KEY_TYPE key, VALUE_TYPE defaultValue) { return EMPTY_VALUE; }
+		public VALUE_TYPE getOrDefault(KEY_TYPE key, VALUE_TYPE defaultValue) { return defaultValue; }
 #endif
+		@Override
+		public VALUE_TYPE COMPUTE(KEY_TYPE key, UNARY_OPERATOR KEY_VALUE_GENERIC_TYPE mappingFunction) { throw new UnsupportedOperationException(); }
+		@Override
+		public VALUE_TYPE COMPUTE_IF_ABSENT(KEY_TYPE key, FUNCTION KEY_VALUE_GENERIC_TYPE mappingFunction) { throw new UnsupportedOperationException(); }
+		@Override
+		public VALUE_TYPE COMPUTE_IF_PRESENT(KEY_TYPE key, UNARY_OPERATOR KEY_VALUE_GENERIC_TYPE mappingFunction) { throw new UnsupportedOperationException(); }
+		@Override
+		public VALUE_TYPE SUPPLY_IF_ABSENT(KEY_TYPE key, VALUE_SUPPLIER VALUE_GENERIC_TYPE valueProvider) { throw new UnsupportedOperationException(); }
+		@Override
+		public VALUE_TYPE MERGE(KEY_TYPE key, VALUE_TYPE value, VALUE_UNARY_OPERATOR VALUE_VALUE_GENERIC_TYPE mappingFunction) { throw new UnsupportedOperationException(); }
+		@Override
+		public void BULK_MERGE(MAP KEY_VALUE_GENERIC_TYPE m, VALUE_UNARY_OPERATOR VALUE_VALUE_GENERIC_TYPE mappingFunction) { throw new UnsupportedOperationException(); }
 		@Override
 		public SET KEY_GENERIC_TYPE keySet() { return SETS.empty(); }
 		@Override
@@ -585,7 +609,7 @@ public class MAPS
 		@Override
 		public VALUE_TYPE GET_VALUE(KEY_TYPE key) {
 			VALUE_TYPE type = map.GET_VALUE(key);
-			return VALUE_EQUALS(type, map.getDefaultReturnValue()) ? getDefaultReturnValue() : type;
+			return VALUE_EQUALS(type, map.getDefaultReturnValue()) && !map.containsKey(key) ? getDefaultReturnValue() : type;
 		}
 #if !TYPE_OBJECT || !VALUE_OBJECT
 		@Override
@@ -605,6 +629,8 @@ public class MAPS
 		public void BULK_MERGE(MAP KEY_VALUE_GENERIC_TYPE m, VALUE_UNARY_OPERATOR VALUE_VALUE_GENERIC_TYPE mappingFunction) { throw new UnsupportedOperationException(); }
 		@Override
 		public MAP KEY_VALUE_GENERIC_TYPE copy() { return map.copy(); }
+		@Override
+		public void clear() { throw new UnsupportedOperationException(); }
 		
 		@Override
 		public SET KEY_GENERIC_TYPE keySet() { 
@@ -687,7 +713,7 @@ public class MAPS
 		@Override
 		public MAP.Entry KEY_VALUE_GENERIC_TYPE firstEntry() { synchronized(mutex) { return map.firstEntry(); } }
 		@Override
-		public MAP.Entry KEY_VALUE_GENERIC_TYPE lastEntry() { synchronized(mutex) { return map.firstEntry(); } }
+		public MAP.Entry KEY_VALUE_GENERIC_TYPE lastEntry() { synchronized(mutex) { return map.lastEntry(); } }
 		@Override
 		public MAP.Entry KEY_VALUE_GENERIC_TYPE pollFirstEntry() { synchronized(mutex) { return map.pollFirstEntry(); } }
 		@Override