class_docstr: Example messenger onboarding world for Chatbot Model.
class_docstr_tok: ["Example","messenger","onboarding","world","for","Chatbot","Model","."]
code: def parley(self):
      self.episodeDone = True
  
imports: from parlai.core.worlds import World
  from parlai.chat_service.services.messenger.worlds import OnboardWorld
  from parlai.core.agents import create_agent_from_shared
label_desc: Use image node_id 2 for calling the MessengerBotChatOnboardWorld obj's underlying member method code with example usage: obj.parley() without return types