code: def _callAsync(self, func, /, *args, **kwargs):
      assert (
          self._asyncioRunner is not None
      ), "asyncio runner is not initialized"
      assert inspect.iscoroutinefunction(
          func
      ), f"{func!r} is not an async function"
      return self._asyncioRunner.run(
          func(*args, **kwargs), context=self._asyncioTestContext
      )
  
file_path: cpython/Lib/unittest/async_case.py
imports: import asyncio
  import contextvars
  import inspect
  import warnings
  from .case import TestCase
label_desc: Use image node_id 7 for calling the IsolatedAsyncioTestCase obj's underlying member method code with example usage: obj._callAsync() and returns: self