def destinations(self):
session = meta.Session()<EOL>sel = select([distinct(model.frames_table.c.destination)])<EOL>result = session.execute(sel)<EOL>return set([r[<NUM_LIT:0>] for r in result.fetchall()])<EOL>
Provides a list of destinations (queue "addresses") available.

@return: A list of the detinations available.
@rtype: C{set}