@Override
    public void setContentEntryEditor(ContentEntryEditor newEditor) {
      PyContentEntriesEditor.MyContentEntryEditor existingEditor = getContentEntryEditor();
      if (Comparing.equal(existingEditor, newEditor)) {
        return;
      }
      if (existingEditor != null) {
        existingEditor.removeListener(myListener);
      }
      if (newEditor != null) {
        ((PyContentEntriesEditor.MyContentEntryEditor)newEditor).addListener(myListener);
      }
      super.setContentEntryEditor(newEditor);
    }
@Override
    public void setContentEntryEditor(ContentEntryEditor newEditor)