code: def send_state_event(self, room_id, event_type, content, state_key="",
                           timestamp=None):
          
          path = "/rooms/%s/state/%s" % (
              quote(room_id), quote(event_type),
          )
          if state_key:
              path += "/%s" % (quote(state_key))
          params = {}
          if timestamp:
              params["ts"] = timestamp
          return self._send("PUT", path, content, query_params=params)
docs: Perform PUT /rooms/$room_id/state/$event_type
  
          Args:
              room_id(str): The room ID to send the state event in.
              event_type(str): The state event type to send.
              content(dict): The JSON content to send.
              state_key(str): Optional. The state key for the event.
              timestamp (int): Set origin_server_ts (For application services only)