persistable sclass G22PixelSplitMasks<A> is IG22OptimizedMasksHolder<MultiSet<A>> {
  replace Mask with IG22Mask<MultiSet<A>>.
  
  settable Pt splitPixel;
  settable IG22MasksHolder<MultiSet<A>> darkHolder;
  settable IG22MasksHolder<MultiSet<A>> brightHolder;
  
  public L<Mask> masks() {
    ret new ConcatOnDemandList(
      darkHolder.masks(),
      brightHolder.masks());
  }
  
  public L<IG22MasksHolder<MultiSet<A>>> subHolders() {
    ret ll(darkHolder, brightHolder);
  }
  
  public void transformSubHolders(IF1<IG22MasksHolder<MultiSet<A>>> f) {
    darkHolder = f.get(darkHolder);
    brightHolder = f.get(brightHolder);
  }
  
  !include early #1035854 // Masks holder Include
}