code: def __init__(self, downstream: DeploymentHandle):
      self._h = downstream
  
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 to create a new Upstream object  with example: obj = Upstream(downstream)