code: def join(self):
      for process in self.processes:
          process.join()
          assert (
              process.exitcode == 0
          ), f"{process.name} has non-zero exit code {process.exitcode}"
  
file_path: CrypTen/examples/multiprocess_launcher.py
imports: import logging
  import multiprocessing
  import os
  import uuid
  import crypten
label_desc: Use image node_id 4 for calling the MultiProcessLauncher obj's underlying member method code with example usage: obj.join() without return types