code: def get_tags(
      default: str = "", env: Optional[Env] = None
  ) -> List[str]:
      if env is None:
          env = os.environ
  
      return [tag for tag in env.get(TAGS, default).split(",") if tag]
  
imports: import json
  import os
  import sys
  from distutils.util import strtobool
  from pathlib import Path
  from typing import List, MutableMapping, Optional, Union
  import appdirs
label_desc: Use image node_id 21 for calling a global function with example usage: get_tags(default, env) and returns: unknown