private boolean revert() {
   if (!hasNameChange() && !hasMembershipChange()) {
     doRevertAction();
   } else {
     CancelEditDialogFragment.show(this);
   }
   return true;
 }
 public static void show(GroupEditorFragment fragment) {
   CancelEditDialogFragment dialog = new CancelEditDialogFragment();
   dialog.setTargetFragment(fragment, 0);
   dialog.show(fragment.getFragmentManager(), "cancelEditor");
 }