@NotNull
  @Override
  public MergeViewer createComponent(@NotNull MergeContext context, @NotNull MergeRequest request) {
    return new BinaryMergeViewer(context, (ThreesideMergeRequest)request);
  }
@NotNull
  @Override
  public MergeViewer createComponent(@NotNull MergeContext context, @NotNull MergeRequest request)