docs: def is_member(self, m):
          """Check if a user is a member of the chatroom"""
          if not m:
              return False
          elif isinstance(m, basestring):
              jid = m
          else:
              jid = m['JID']
  
          is_member = len(filter(lambda m: m['JID'] == jid and m.get('STATUS') in ('ACTIVE', 'INVITED'), self.params['MEMBERS'])) > 0
  
          return is_member