code: def pointer_top(body_output, targets, model_hparams, vocab_size):
      """Like identity_top() with is_pointwise annotation."""
      del targets, model_hparams, vocab_size  # unused arg
      return body_output
  
imports: from __future__ import absolute_import
  from __future__ import division
  from __future__ import print_function
  import os
  from tensor2tensor.data_generators import text_encoder
  from tensor2tensor.data_generators import text_problems
  from tensor2tensor.layers import modalities
  from tensor2tensor.utils import registry
  import tensorflow.compat.v1
label_desc: Use image node_id 1 for calling a global function with example usage: pointer_top(body_output, targets, model_hparams, vocab_size) and returns: body_output