code: def update(self):
      assert (
          self.binded
          and self.params_initialized
          and self.optimizer_initialized
      )
      self._curr_module.update()
      for i, _module in enumerate(self._arcface_modules):
          _module.update()
      mx.nd.waitall()
  
imports: import logging
  import copy
  import time
  import os
  import mxnet
  import numpy
  from mxnet import context
  from mxnet.initializer import Uniform
  from mxnet.module.base_module import BaseModule
  from mxnet.module.module import Module
  from mxnet import metric
  from mxnet.model import BatchEndParam
  from mxnet import io
  import mxnet.ndarray
  from config import config
label_desc: Use image node_id 19 for calling the ParallModule obj's underlying member method code with example usage: obj.update() without return types