Compatibility functions. Do not use!
Replacement examples:
Old code:
img=map_fs(img->select_colors(200));
New code:
img=Image.Colortable(img,200)->floyd_steinberg()->map(img);
Old code:
img=map_closest(img->select_colors(17)+({({255,255,255}),({0,0,0})}));
New code:
img=Image.Colortable(img,19,({({255,255,255}),({0,0,0})}))->map(img);