I would like to set the zorder on a collection e.g. PatchCollection. By looking at the matplotlib source code in collections.py, I figured that it would be possible to set the zorder attribute of a collection manually, e.g.
p = PatchCollection(...)
p.zorder = ...
but I was wondering whether it would make sense to allow zorder to be passed as a keyword argument when initializing a collection, or when running ax.add_collection, or is there a reason that this was not done?