Security mechanism response

        This method attempts to authenticate, passing a block of SASL
        data for the security mechanism at the server side.

        PARAMETERS:
            response: longstr

                security response data

                A block of opaque data passed to the security
                mechanism.  The contents of this data are defined by
                the SASL security mechanism.

def _x_secure_ok(self, response):
        """Security mechanism response

        This method attempts to authenticate, passing a block of SASL
        data for the security mechanism at the server side.

        PARAMETERS:
            response: longstr

                security response data

                A block of opaque data passed to the security
                mechanism.  The contents of this data are defined by
                the SASL security mechanism.

        """
        args = AMQPWriter()
        args.write_longstr(response)
        self._send_method((10, 21), args)