code: def __init__(self, app):
      self.app = app
  
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 1 to create a new AsgiTracer object  with example: obj = AsgiTracer(app)