code: def stop_spark_standalone():
      """
      Stop the Spark standalone cluster created from init_spark_standalone (master not specified).
      """
      from bigdl.dllib.utils.spark import SparkRunner
  
      SparkRunner.stop_spark_standalone()
  
imports: from bigdl.dllib.utils.common import *
  from bigdl.dllib.utils.file_utils import callZooFunc
  from bigdl.dllib.utils.utils import set_python_home
  from bigdl.dllib.utils.log4Error import *
  import warnings
  import multiprocessing
  import os
  import threading
  import sys
label_desc: Use image node_id 7 for calling a global function with example usage: stop_spark_standalone() without return types