@Override
  public void uiDataSnapshot(@NotNull DataSink sink) {
    sink.set(CommonDataKeys.PROJECT, myProject);
    sink.set(PlatformDataKeys.COPY_PROVIDER, myTreeCopyProvider);
    sink.set(ChangesGroupingSupport.KEY, myGroupingSupport);
    sink.set(PlatformDataKeys.TREE_EXPANDER, myTreeExpander);
  }
@Override
  public void uiDataSnapshot(@NotNull DataSink sink)