def subscribe(dest, ack='<STR_LIT>'):
return "<STR_LIT>" % (dest, ack)<EOL>
STOMP subscribe command.

    dest:
        This is the channel we wish to subscribe to

    ack: 'auto' | 'client'
        If the ack is set to client, then messages received will
        have to have an acknowledge as a reply. Otherwise the server
        will assume delivery failure.