code: def _a_generator(foo):
      """Used to have an object to return for generators."""
      yield 42
      yield foo
  
imports: import inspect
  import types
  import sys
  from textwrap import dedent
  import operator
  from collections import namedtuple
  from jedi._compatibility import unicode, is_py3, builtins, py_version, force_unicode, print_to_stderr
  from jedi.evaluate.compiled.getattr_static import getattr_static
label_desc: Use image node_id 1 for calling a global function with example usage: _a_generator(foo) without return types