code: def _flip(image):
      """Random horizontal image flip."""
      image = tf.image.random_flip_left_right(image)
      return image
  
file_path: tensor2tensor/tensor2tensor/data_generators/vqa_utils.py
imports: from __future__ import absolute_import
  from __future__ import division
  from __future__ import print_function
  import tensorflow.compat.v1
  from tensorflow.compat.v1 import estimator
  from tensorflow.python.ops import control_flow_ops
label_desc: Use image node_id 3 for calling a global function with example usage: _flip(image) and returns: image