code: def probe_mxnet_variant(limxnet_path: str) -> Optional[str]:
      """
      Probes the libmxnet library and environment to determine
      the mxnet variant, eg. cpu, cu102, etc.
      :return:
      """
      logger.debug("Probing for mxnet variant")
      features = get_libmxnet_features(limxnet_path)
      if not features:
          logger.debug(
              "Error: could not determine variant. Features could not be extracted from libmxnet"
          )
          return None
  
      if features["CUDA"]:
          return probe_gpu_variant(features)
      return probe_cpu_variant(features)
  
imports: import argparse
  import ctypes
  import glob
  import logging
  import os
  import re
  import sys
  from itertools import chain
  from subprocess import CalledProcessError, check_output
  from typing import Dict, List, Optional
  import boto3
  import botocore.exceptions
  import yaml
label_desc: Use image node_id 14 for calling a global function with example usage: probe_mxnet_variant(limxnet_path) and returns: probe_cpu_variant, None, probe_gpu_variant