class_docstr: Model taken from my traffic signs recognition repo.
  https://github.com/waleedka/traffic-signs-tensorflow
class_docstr_tok: ["Model","taken","from","my","traffic","signs","recognition","repo",".","https",":","\/\/github.com\/waleedka\/traffic-signs-tensorflow"]
code: def pool(self, input):
      return layers.max_pool2d(
          input, kernel_size=(2, 2), stride=(2, 2), padding="SAME"
      )
  
file_path: hiddenlayer/tests/test_tf_graph.py
imports: import os
  import sys
  import shutil
  import unittest
  import tensorflow
  import tensorflow.contrib.slim.nets
  from tensorflow.contrib import layers
  import hiddenlayer
label_desc: Use image node_id 2 for calling the TrafficSignsModel obj's underlying member method code with example usage: obj.pool(input) and returns: layers