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