'Determines whether throttling should prevent us from sending an email
for the given room
Returns: The timestamp when we are next allowed to send an email notif
for this room'

def room_ready_to_notify_at(self, room_id):

    last_sent_ts = self.get_room_last_sent_ts(room_id)
    throttle_ms = self.get_room_throttle_ms(room_id)
    may_send_at = (last_sent_ts + throttle_ms)
    return may_send_at
