@NotNull
      @Override
      public DiffRequest process(@NotNull UserDataHolder context, @NotNull ProgressIndicator indicator)
        throws DiffRequestProducerException, ProcessCanceledException {
        throw new DiffRequestProducerException(
          VcsBundle.message("changes.error.cannot.find.base.for.path", beforePath != null ? beforePath : afterPath));
      }
@NotNull
      @Override
      public DiffRequest process(@NotNull UserDataHolder context, @NotNull ProgressIndicator indicator)