def __init__(cls, name, bases, attrs):
    """Replace :attr:`_base_store`, :attr:`_base_register_map` and
        :attr:`_base_register_class_map` by copies of themselves

        :argument name: New class name
        :type name: str
        :argument bases: New class bases
        :type bases: tuple
        :argument attrs: New class attributes
        :type attrs: dict

        .. seealso::

           For doctests that use this member, see
           :class:`django_crucrudile.entities.store.EntityStoreMetaclassMixin`

        """
    super().__init__(name, bases, attrs)
    cls._base_store = cls._base_store.copy()
