code: def stop_validation_queue_thread():
      """Stop the thread that handles module validation"""
  
      if mv_constants.pipeline_queue_thread is not None:
          mv_constants.validation_queue_keep_running = False
          mv_constants.validation_queue.put(None)
          mv_constants.pipeline_queue_thread.join()
  
imports: import logging
  import threading
  import time
  import wx
  from cellprofiler_core.setting import ValidationError
  import cellprofiler.gui.constants.module_view
  from cellprofiler.gui.module_view._validation_request_controller import ValidationRequestController
label_desc: Use image node_id 30 for calling a global function with example usage: stop_validation_queue_thread() without return types