--- a/truffle/com.oracle.truffle.object/src/com/oracle/truffle/object/DynamicObjectImpl.java	Sat Sep 12 22:37:38 2015 +0200
+++ b/truffle/com.oracle.truffle.object/src/com/oracle/truffle/object/DynamicObjectImpl.java	Sat Sep 12 22:47:16 2015 +0200
@@ -184,7 +184,6 @@
         }
     }
 
-    @Override
     @TruffleBoundary
     public boolean changeFlags(Object id, int newFlags) {
         Shape oldShape = getShape();
@@ -201,24 +200,6 @@
         }
     }
 
-    @Override
-    @TruffleBoundary
-    public boolean changeFlags(Object id, FlagsFunction updateFunction) {
-        Shape oldShape = getShape();
-        Property existing = oldShape.getProperty(id);
-        if (existing != null) {
-            int newFlags = updateFunction.apply(existing.getFlags());
-            if (existing.getFlags() != newFlags) {
-                Property newProperty = existing.copyWithFlags(newFlags);
-                Shape newShape = oldShape.replaceProperty(existing, newProperty);
-                this.setShape(newShape);
-            }
-            return true;
-        } else {
-            return false;
-        }
-    }
-
     public String debugDump(int level) {
         return debugDump(0, level);
     }