class_docstr: Provides a lazy-loaded interface to a Python module, and its submodules. The module will not
  be imported until an attribute is accessed.
code: def __import_module(self) -> None:
      try:
          self.__module = importlib.import_module(self.__module_name)
      except ImportError as exc:  # pragma: no cover
          if self.__import_exc:
              raise self.__import_exc from exc
  
          raise exc
  
      if self.__post_import_cb:
          self.__post_import_cb(self.__module)
  
imports: import importlib
  from types import ModuleType
  from typing import Any, Callable, Optional, Union
label_desc: Use image node_id 3 for calling the lazy_module obj's underlying member method code with example usage: obj.__import_module() without return types