def get_authentication_batch_manager(self):
raise errors.Unimplemented()<EOL>
Gets an ``AuthenticationBatchManager``.

        return: (osid.authentication.batch.AuthenticationBatchManager) -
                an ``AuthenticationBatchManager``.
        raise:  OperationFailed - unable to complete request
        raise:  Unimplemented - ``supports_authentication_batch()`` is
                ``false``
        *compliance: optional -- This method must be implemented if
        ``supports_authentication_batch()`` is ``true``.*