code: async def send_rpc(self, msg, _context):
          
  
          service = msg.get('name')
          rpc_id = msg.get('rpc_id')
          payload = msg.get('payload')
          timeout = msg.get('timeout')
  
          response_id = await self.service_manager.send_rpc_command(service, rpc_id, payload,
                                                                    timeout)
  
          try:
              result = await self.service_manager.rpc_results.get(response_id, timeout=timeout)
          except asyncio.TimeoutError:
              self._logger.warning("RPC 0x%04X on service %s timed out after %f seconds",
                                   rpc_id, service, timeout)
              result = dict(result='timeout', response=b'')
  
          return result
docs: Send an RPC to a service on behalf of a client.