class_docstr: A thread for a control channel.
class_docstr_tok: ["A","thread","for","a","control","channel","."]
docstr: Stop the thread.
  
  This method is threadsafe.
docstr_tok: ["Stop","the","thread",".","This","method","is","threadsafe","."]
code: def stop(self):
      """Stop the thread.
  
      This method is threadsafe.
      """
      self.io_loop.add_callback(self.io_loop.stop)
  
imports: from threading import Thread
  from tornado.ioloop import IOLoop
label_desc: Use image node_id 3 for calling the ControlThread obj's underlying member method code with example usage: obj.stop() without return types