code: def add_name_scope(scope=None):
      return add_scope(scope, scope_fn=tf.name_scope)
  
imports: from __future__ import absolute_import
  from __future__ import division
  from __future__ import print_function
  import functools
  import math
  import six
  from six.moves import range
  from six.moves import zip
  from tensor2tensor.layers import common_layers
  from tensor2tensor.layers.vq_discrete import DiscreteBottleneck
  import tensorflow.compat.v1
label_desc: Use image node_id 3 for calling a global function with example usage: add_name_scope(scope) and returns: add_scope