@Override
  public void setDropPossible(boolean possible, @Nullable @NlsContexts.PopupContent String aExpectedResult) {
    myDropPossible = possible;
    myExpectedDropResult = aExpectedResult;
    clearDropHandler();
  }
@Override
  public void setDropPossible(boolean possible, @Nullable @NlsContexts.PopupContent String aExpectedResult)