code: def __call__(self):
      return serve.get_multiplexed_model_id()
  
file_path: ray/doc/source/serve/doc_code/multiplexed.py
imports: from ray import serve
  import aioboto3
  import torch
  import starlette
  import requests
  from ray.serve.handle import DeploymentHandle
label_desc: Use image node_id 1 for calling the Downstream obj's underlying member method code with example usage: obj.__call__() and returns: serve