GetMaxSequenceId.
        Read the max sequence id of all the identities.
        :rtype: long

def get_max_sequence_id(self):
        """GetMaxSequenceId.
        Read the max sequence id of all the identities.
        :rtype: long
        """
        response = self._send(http_method='GET',
                              location_id='e4a70778-cb2c-4e85-b7cc-3f3c7ae2d408',
                              version='5.0')
        return self._deserialize('long', response)