class_docstr: ResNet model.
code: def get_vars(self):
      if hasattr(self, "vars"):
          return self.vars
      return super(ResNet, self).get_vars()
  
imports: from __future__ import absolute_import
  from __future__ import division
  from __future__ import print_function
  import numpy
  import tensorflow
  from cleverhans.serial import NoRefModel
label_desc: Use image node_id 2 for calling the ResNet obj's underlying member method code with example usage: obj.get_vars() and returns: super, self