code: def test_mobilenet_sync_bn():
      model_name = "mobilenet1.0"
      net = gcv.model_zoo.get_model(model_name, pretrained=True)
      net.save_parameters(model_name + ".params")
      net = gcv.model_zoo.get_model(
          model_name,
          pretrained=False,
          norm_layer=mx.gluon.contrib.nn.SyncBatchNorm,
          norm_kwargs={"num_devices": 2},
      )
      net.load_parameters(model_name + ".params")
  
imports: from __future__ import print_function
  import warnings
  import logging
  import mxnet
  from mxnet.contrib.quantization import *
  from ..unittests.common import try_gpu, with_cpu
  import gluoncv
label_desc: Use image node_id 34 for calling a global function with example usage: test_mobilenet_sync_bn() without return types