code: def f():
      return "Hello from the root!"
  
imports: import starlette.requests
  import requests
  from ray import serve
  import ray
  import requests
  from fastapi import FastAPI
  from ray import serve
  import ray
  import requests
  from fastapi import FastAPI
  from ray import serve
  import ray
  import requests
  from fastapi import FastAPI
  from ray import serve
label_desc: Use image node_id 1 for calling a global function with example usage: f() and returns: str