@Nullable
  @Override
  protected ChangeDiffRequestChain.Producer getDiffRequestProducer(@NotNull Object entry) {
    if (entry instanceof FilePath) {
      return UnversionedDiffRequestProducer.create(myProject, (FilePath)entry);
    }
    return super.getDiffRequestProducer(entry);
  }
@Nullable
  @Override
  protected ChangeDiffRequestChain.Producer getDiffRequestProducer(@NotNull Object entry)