code: def test_instance_docs(self):
      cm_docstring = aclosing.__doc__
      obj = aclosing(None)
      self.assertEqual(obj.__doc__, cm_docstring)
  
imports: import asyncio
  from contextlib import asynccontextmanager, AbstractAsyncContextManager, AsyncExitStack, nullcontext, aclosing, contextmanager
  from test import support
  import unittest
  import traceback
  from test.test_contextlib import TestBaseExitStack
label_desc: Use image node_id 1 for calling the AclosingTestCase obj's underlying member method code with example usage: obj.test_instance_docs() without return types