@Override
    public void processContextHints(@NotNull DiffRequest request, @NotNull DiffContext context) {
      Side side = DiffUtil.getUserData(request, context, DiffUserDataKeys.PREFERRED_FOCUS_SIDE);
      if (side != null) setCurrentSide(side);
    }
@Override
    public void processContextHints(@NotNull DiffRequest request, @NotNull DiffContext context)