code: def uncancel(self):
          
  
          if self.cancelled:
              logger.debug("Uncancelling {}".format(self))
              self.cancelled = False
          self.save()
          # NOT USED. Was broken anyway.
          """
          cancelled_room = EighthRoom.objects.get_or_create(name="CANCELLED", capacity=0)[0]
          cancelled_sponsor = EighthSponsor.objects.get_or_create(first_name="", last_name="CANCELLED")[0]
          if cancelled_room in list(self.rooms.all()):
              self.rooms.filter(id=cancelled_room.id).delete()
  
          if cancelled_sponsor in list(self.sponsors.all()):
              self.sponsors.filter(id=cancelled_sponsor.id).delete()
  
          self.save()
          """
docs: Uncancel an EighthScheduledActivity.
  
          This does nothing besides unset the cancelled flag and save the
          object.