code: def f(a: int) -> str:
      return "a = {}".format(a + 1)
  
file_path: ray/python/ray/tests/typing_files/check_typing_good.py
imports: import ray
  from typing import Generator
  from ray import ObjectRef
label_desc: Use image node_id 2 for calling a global function with example usage: f(a) and returns: str