code: def trace_child_tasks():
      token = trace_task_id.set(get_task_id())
      yield
      trace_task_id.reset(token)
  
file_path: datasette/datasette/tracer.py
imports: import asyncio
  from contextlib import contextmanager
  from contextvars import ContextVar
  from markupsafe import escape
  import time
  import json
  import traceback
label_desc: Use image node_id 2 for calling a global function with example usage: trace_child_tasks() without return types