code: def _default_flag_env_name(flag_name):
      return f"FLAG_{util.env_var_name(flag_name)}"
  
imports: import logging
  import pprint
  from guild import flag_util
  from guild import util
  from guild import yaml_util
label_desc: Use image node_id 24 for calling a global function with example usage: _default_flag_env_name(flag_name) and returns: str, util