code: def send_email(result: str) -> None:
      print("Sending email", result)
  
file_path: ray/python/ray/workflow/examples/comparisons/argo/exit_handler_workflow.py
imports: from typing import Tuple, Optional
  import ray
  from ray import workflow
label_desc: Use image node_id 4 for calling a global function with example usage: send_email(result) without return types