code: def start(self):
      self.conn.send("#start")
      code = self.conn.recv()
      if code is not None:
          raise RuntimeError(
              "Failed to start NNGDevice, {}".format(code)
          )
  
imports: import random
  import logging
  import multiprocessing
  import threading
  from fiber.backend import get_backend
label_desc: Use image node_id 9 for calling the NNGDevice obj's underlying member method code with example usage: obj.start() without return types