void mergeUndoConfirmationPolicy(UndoConfirmationPolicy undoConfirmationPolicy) {
    if (myUndoConfirmationPolicy == UndoConfirmationPolicy.DEFAULT) {
      myUndoConfirmationPolicy = undoConfirmationPolicy;
    }
    else if (myUndoConfirmationPolicy == UndoConfirmationPolicy.DO_NOT_REQUEST_CONFIRMATION) {
      if (undoConfirmationPolicy == UndoConfirmationPolicy.REQUEST_CONFIRMATION) {
        myUndoConfirmationPolicy = UndoConfirmationPolicy.REQUEST_CONFIRMATION;
      }
    }
  }
void mergeUndoConfirmationPolicy(UndoConfirmationPolicy undoConfirmationPolicy)