class_docstr: Stem layer at the begining of the network.
class_docstr_tok: ["Stem","layer","at","the","begining","of","the","network","."]
code: def call(self, inputs, training):
      return self._relu_fn(
          self._bn(self._conv_stem(inputs), training=training)
      )
  
imports: import collections
  import itertools
  import math
  from absl import logging
  import numpy
  import six
  from six.moves import xrange
  import tensorflow
  import utils
label_desc: Use image node_id 2 for calling the Stem obj's underlying member method code with example usage: obj.call(inputs, training) and returns: self