code: def get_global_str(name: str) -> str:
      val = get_global_val(name)
      if not isinstance(val, str):
          raise ValueError(
              "Not string value: ['{}'] : {}".format(
                  _to_actual_name(name), type(val)
              )
          )
      return val
  
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 9 for calling a global function with example usage: get_global_str(name) and returns: val