code: def get_loss(config):
      return gluon.loss.SoftmaxCrossEntropyLoss()
  
file_path: BigDL/python/orca/test/bigdl/orca/learn/ray/mxnet/test_mxnet_gluon.py
imports: from unittest import TestCase
  import numpy
  import pytest
  import mxnet
  from mxnet import gluon
  from mxnet.gluon import nn
  from bigdl.orca.ray import OrcaRayContext
  from bigdl.orca.learn.mxnet import Estimator, create_config
label_desc: Use image node_id 4 for calling a global function with example usage: get_loss(config) and returns: gluon