code: def main(unused_argv):
      train(
          FLAGS.batch_size,
          FLAGS.learning_rate,
          FLAGS.num_training_iters,
          FLAGS.validation_steps,
      )
  
imports: from absl import app
  from absl import flags
  from six.moves import range
  import tensorflow.compat.v2
  from trax.tf_numpy.examples.mnist import dataset
  from trax.tf_numpy.examples.mnist import model
label_desc: Use image node_id 2 for calling a global function with example usage: main(unused_argv) without return types