code: def send_global(self, room: str, message: Message) -> None:
          
          self._global_send_queue.put((room, message))
          self._global_send_event.set()
docs: Sends a message to one of the global rooms
  
          These rooms aren't being listened on and therefore no reply could be heard, so these
          messages are sent in a send-and-forget async way.
          The actual room name is composed from the suffix given as parameter and chain name or id
          e.g.: raiden_ropsten_discovery
          Params:
              room: name suffix as passed in config['global_rooms'] list
              message: Message instance to be serialized and sent