@Override
    public void process(@NotNull DiffDividerDrawUtil.DividerPaintable.Handler handler) {
      for (SimpleDiffChangeUi diffChange : myPresentations) {
        if (diffChange == null) continue;
        boolean keepWalk = diffChange.drawDivider(handler);
        if (!keepWalk) return;
      }
    }
@Override
    public void process(@NotNull DiffDividerDrawUtil.DividerPaintable.Handler handler)