code: def setUp(self):
      def myhelper(model, val=-1):
          return val
  
      if not brew.has_helper(myhelper):
          brew.Register(myhelper)
      self.myhelper = myhelper
  
      def myhelper2(model, val=-1):
          return val
  
      if not brew.has_helper(myhelper2):
          brew.Register(myhelper2)
      self.myhelper2 = myhelper2
      self.model = ModelHelper(name="test_model")
  
imports: from caffe2.python import brew, core, scope, workspace
  from caffe2.python.modeling.parameter_info import ParameterTags
  from caffe2.python.model_helper import ModelHelper
  from caffe2.python.cnn import CNNModelHelper
  import unittest
  import numpy
label_desc: Use image node_id 1 for calling the BrewTest obj's underlying member method code with example usage: obj.setUp() and returns: val, val