code: def retrieve_clang_version(clang_executable):
      """Retrieve installed clang version.
  
      Args:
        clang_executable: (String) path to clang executable
  
      Returns:
        The clang version detected.
      """
      stderr = open(os.devnull, "wb")
      curr_version = run_shell(
          [clang_executable, "--version"],
          allow_non_zero=True,
          stderr=stderr,
      )
  
      curr_version_split = curr_version.lower().split("clang version ")
      if len(curr_version_split) > 1:
          curr_version = curr_version_split[1].split()[0]
  
      curr_version_int = convert_version_to_int(curr_version)
      # Check if current clang version can be detected properly.
      if not curr_version_int:
          print(
              "WARNING: current clang installation is not a release version.\n"
          )
          return None
  
      print("You have Clang %s installed.\n" % curr_version)
      return curr_version
  
imports: import argparse
  import errno
  import glob
  import json
  import os
  import platform
  import re
  import subprocess
  import sys
label_desc: Use image node_id 34 for calling a global function with example usage: retrieve_clang_version(clang_executable) and returns: curr_version, None