def conference(self, id, **options):
self._steps.append(Conference(id, **options).obj)<EOL>
This object allows multiple lines in separate sessions to be conferenced together so that the parties on each line can talk to each other simultaneously.
This is a voice channel only feature.
Argument: "id" is a String
Argument: **options is a set of optional keyword arguments.
See https://www.tropo.com/docs/webapi/conference