code: def __call__(self):
      self._process.start()
      ready = self._child.recv()
      assert ready == "ready"
      print(self._process.pid)
  
      self._child.send("start")
  
file_path: labml/client/labml/internal/manage/process.py
imports: import importlib
  import multiprocessing
  import multiprocessing.connection
  from pathlib import PurePath
  from typing import Dict, Optional
  from labml import lab
  from labml.internal import experiment
label_desc: Use image node_id 2 for calling the Process obj's underlying member method code with example usage: obj.__call__() without return types