code: def __call__(self):
      return self.msg
  
imports: from ray import serve
  from ray.serve.handle import DeploymentHandle
  from ray import serve
  from ray.serve.handle import DeploymentHandle
  import requests
  from starlette.requests import Request
  from ray import serve
  import requests
  from fastapi import FastAPI
  from fastapi.responses import PlainTextResponse
  from ray import serve
label_desc: Use image node_id 2 for calling the MyFirstDeployment obj's underlying member method code with example usage: obj.__call__() and returns: self