code: def main(unused_argv=None):
      obj = create_hub_module_object()
      with tf.Session() as sess:
          sess.run(tf.initialize_all_variables())
          tf.train.Saver(obj.variables).restore(sess, FLAGS.checkpoint)
          tf.saved_model.save(
              obj, FLAGS.export_path, signatures=obj.__call__
          )
      tf.logging.info("Saved hub module in: %s", FLAGS.export_path)
  
file_path: magenta/magenta/models/arbitrary_image_stylization/export_hub.py
imports: from absl import flags
  from magenta.models.arbitrary_image_stylization import arbitrary_image_stylization_build_model
  import tensorflow.compat.v1
label_desc: Use image node_id 4 for calling a global function with example usage: main(unused_argv) without return types