code: def yaml_file_extension() -> Text:
      """Return YAML file extension."""
      return YAML_FILE_EXTENSIONS[0]
  
imports: import os
  import shutil
  import tempfile
  import uuid
  from enum import Enum
  from pathlib import Path
  from typing import Text, Optional, Union, List, Callable, Set, Iterable
label_desc: Use image node_id 1 for calling a global function with example usage: yaml_file_extension() and returns: YAML_FILE_EXTENSIONS