@NotNull
  @Override
  public DiffViewer createComponent(@NotNull DiffContext context, @NotNull DiffRequest request) {
    return SvnPropertiesDiffViewer.create(context, (SvnPropertiesDiffRequest)request);
  }
@NotNull
  @Override
  public DiffViewer createComponent(@NotNull DiffContext context, @NotNull DiffRequest request)