code: def _get_env_val(actual_name: str) -> Any:
      env_name = "LETS_PLOT_{}".format(actual_name.upper())
      return os.environ.get(env_name)
  
file_path: lets-plot/python-package/lets_plot/_global_settings.py
imports: import os
  from typing import Any
  from ._version import __version__
label_desc: Use image node_id 2 for calling a global function with example usage: _get_env_val(actual_name) and returns: os