code: def parse_full_class_name(full_class_name):
      if not full_class_name:
          return None, None
      parts = full_class_name.split(".")
      module_name, class_name = ".".join(parts[:-1]), parts[-1]
      return module_name, class_name
  
file_path: nni/nni/tools/package_utils/tuner_factory.py
imports: from __future__ import annotations
  import importlib
  import os
  import sys
  from typing import Any
  from typing_extensions import Literal
  from .None import config_manager
label_desc: Use image node_id 3 for calling a global function with example usage: parse_full_class_name(full_class_name) and returns: module_name,  class_name, None,  None