code: def start_agent(agent, recp, desc, allocation_id=None, *args, **kwargs):
      '''
      Tells remote host agent to start agent identified by desc.
      The result value of the fiber is IRecipient.
      '''
      f = fiber.Fiber()
      f.add_callback(agent.initiate_protocol, IRecipient(recp), desc,
                     allocation_id, *args, **kwargs)
      f.add_callback(StartAgentRequester.notify_finish)
      f.succeed(StartAgentRequester)
      return f start_agent(agent, recp, desc, allocation_id=None, *args, **kwargs):
      '''
      Tells remote host agent to start agent identified by desc.
      The result value of the fiber is IRecipient.
      '''
      f = fiber.Fiber()
      f.add_callback(agent.initiate_protocol, IRecipient(recp), desc,
                     allocation_id, *args, **kwargs)
      f.add_callback(StartAgentRequester.notify_finish)
      f.succeed(StartAgentRequester)
      return f
docs: Tells remote host agent to start agent identified by desc.
      The result value of the fiber is IRecipient.