@NotNull
  @Override
  public DiffRequest process(@NotNull ChangeDiffRequestProducer presentable,
                             @NotNull UserDataHolder context,
                             @NotNull ProgressIndicator indicator) throws ProcessCanceledException {
    indicator.checkCanceled();
    return new SvnPhantomDiffRequest(presentable.getChange());
  }
@NotNull
  @Override
  public DiffRequest process(@NotNull ChangeDiffRequestProducer presentable,
                             @NotNull UserDataHolder context,
                             @NotNull ProgressIndicator indicator)