Add new split functions

src/main/java/carpet/script/value/MapValue.java

@@ -203,6 +203,11 @@ public class MapValue extends AbstractListValue implements ContainerValueInterfa
         throw new InternalExpressionException("Cannot slice a map value");
     }
 
+    @Override
+    public Value split(Value delimiter) {
+    	throw new InternalExpressionException("Cannot split a map value");
+    }
+
     @Override
     public double readDoubleNumber()
     {