@Nullable
  @Override
  protected RefactoringEventData getBeforeData() {
    RefactoringEventData data = new RefactoringEventData();
    data.addElement(mySourceClass);
    data.addMembers(myMembersToMove, info -> info.getMember());
    return data;
  }
@Nullable
  @Override
  protected RefactoringEventData getBeforeData()