def _x_open(self):
if self.is_open:<EOL><INDENT>return<EOL><DEDENT>args = AMQPWriter()<EOL>args.write_shortstr('<STR_LIT>')  <EOL>self._send_method((<NUM_LIT:20>, <NUM_LIT:10>), args)<EOL>return self.wait(allowed_methods=[<EOL>(<NUM_LIT:20>, <NUM_LIT:11>),  <EOL>])<EOL>
Open a channel for use

        This method opens a virtual connection (a channel).

        RULE:

            This method MUST NOT be called when the channel is already
            open.

        PARAMETERS:
            out_of_band: shortstr (DEPRECATED)

                out-of-band settings

                Configures out-of-band transfers on this channel.  The
                syntax and meaning of this field will be formally
                defined at a later date.