code: def maybe_install_cmdstan_toolchain() -> bool:
      """Install C++ compilers required to build stan models on Windows machines."""
      import cmdstanpy
  
      try:
          cmdstanpy.utils.cxx_toolchain_path()
          return False
      except Exception:
          try:
              from cmdstanpy.install_cxx_toolchain import (
                  run_rtools_install,
              )
          except ImportError:
              # older versions
              from cmdstanpy.install_cxx_toolchain import (
                  main as run_rtools_install,
              )
  
          run_rtools_install(
              {"version": None, "dir": None, "verbose": True}
          )
          cmdstanpy.utils.cxx_toolchain_path()
          return True
  
imports: import os
  import platform
  from pathlib import Path
  from shutil import copy, copytree, rmtree
  from typing import List
  import tempfile
  from setuptools import find_packages, setup, Extension
  from setuptools.command.build_ext import build_ext
  from setuptools.command.build_py import build_py
  from setuptools.command.editable_wheel import editable_wheel
  from wheel.bdist_wheel import bdist_wheel
label_desc: Use image node_id 3 for calling a global function with example usage: maybe_install_cmdstan_toolchain() and returns: False, True