@Override
    public void uiDataSnapshot(@NotNull DataSink sink) {
      super.uiDataSnapshot(sink);
      sink.set(PlatformDataKeys.DELETE_ELEMENT_PROVIDER, myDeleteProvider);
      sink.set(CommonDataKeys.VIRTUAL_FILE_ARRAY,
               getSelectedChanges().toArray(VirtualFile.EMPTY_ARRAY));
    }
@Override
    public void uiDataSnapshot(@NotNull DataSink sink)