docs: async def close(self):
          """
          Terminate the ICE agent, ending ICE processing and streams.
          """
          if self.__isClosed:
              return
          self.__isClosed = True
          self.__setSignalingState('closed')
  
          # stop senders / receivers
          for transceiver in self.__transceivers:
              await transceiver.stop()
          if self.__sctp:
              await self.__sctp.stop()
  
          # stop transports
          for transceiver in self.__transceivers:
              await transceiver._transport.stop()
              await transceiver._transport.transport.stop()
          if self.__sctp:
              await self.__sctp.transport.stop()
              await self.__sctp.transport.transport.stop()
          self.__updateIceConnectionState()
  
          # no more events will be emitted, so remove all event listeners
          # to facilitate garbage collection.
          self.remove_all_listeners()