code: def __init__(self, echo_str: str):
      self.echo_str = echo_str
  
file_path: ray/doc/source/serve/doc_code/model_composition/language_example.py
imports: import requests
  from starlette.requests import Request
  from ray import serve
  import requests
  from ray import serve
  from ray.serve.handle import DeploymentHandle
  import requests
label_desc: Use image node_id 1 to create a new EchoClass object  with example: obj = EchoClass(echo_str)