code: def stop_spark_standalone():
      """
      Stop the Spark standalone cluster created from init_spark_standalone (master not specified).
      """
      from zoo.util.spark import SparkRunner
  
      SparkRunner.stop_spark_standalone()
  
imports: from bigdl.util.common import *
  from zoo.common.utils import callZooFunc
  from zoo.util.utils import set_python_home
  import warnings
  import multiprocessing
  import os
  import threading
  import sys
label_desc: Use image node_id 5 for calling a global function with example usage: stop_spark_standalone() without return types