Put attributes from `class_dict` back on `skeleton_class`.

    See CloudPickler.save_dynamic_class for more info.

def _rehydrate_skeleton_class(skeleton_class, class_dict):
    """Put attributes from `class_dict` back on `skeleton_class`.

    See CloudPickler.save_dynamic_class for more info.
    """
    registry = None
    for attrname, attr in class_dict.items():
        if attrname == "_abc_impl":
            registry = attr
        else:
            setattr(skeleton_class, attrname, attr)
    if registry is not None:
        for subclass in registry:
            skeleton_class.register(subclass)

    return skeleton_class