@classmethod
def set_creator(cls, obj, creator):
    """
        Set the creator of an object.  This should no typically be called by user code.

        :param obj: the object to set the creator of
        :type obj: mincepy.SavableObject
        :param creator: the creating object
        :type creator: mincepy.SavableObject
        """
    cls._creators[obj] = creator
