@abc.abstractmethod<EOL><INDENT>def get_vaults_by_parent_genus_type(self, vault_genus_type):<DEDENT>
return<EOL>
Gets a ``VaultList`` corresponding to the given vault genus ``Type`` and include any additional vaults with genus types derived from the specified ``Type``.

        In plenary mode, the returned list contains all known vaults or
        an error results. Otherwise, the returned list may contain only
        those vaults that are accessible through this session.

        :param vault_genus_type: a vault genus type
        :type vault_genus_type: ``osid.type.Type``
        :return: the returned ``Vault`` list
        :rtype: ``osid.authorization.VaultList``
        :raise: ``NullArgument`` -- ``vault_genus_type`` is ``null``
        :raise: ``OperationFailed`` -- unable to complete request
        :raise: ``PermissionDenied`` -- authorization failure

        *compliance: mandatory -- This method must be implemented.*