def _x_close_ok(self):
self._send_method((<NUM_LIT:10>, <NUM_LIT>))<EOL>self._do_close()<EOL>
Confirm a connection close

        This method confirms a Connection.Close method and tells the
        recipient that it is safe to release resources for the
        connection and close the socket.

        RULE:

            A peer that detects a socket closure without having
            received a Close-Ok handshake method SHOULD log the error.