code: def test_decode_batch(self):
      ctable = create_ctable()
      batch = ctable.get_batch(5)
      key = random.key(0)
      state = create_train_state(ctable)
      train.decode_batch(state, batch, key, ctable)
  
file_path: flax/examples/seq2seq/train_test.py
imports: import functools
  from absl.testing import absltest
  from flax.training import train_state
  import jax
  from jax import random
  import numpy
  import optax
  import input_pipeline
  import train
  import models
label_desc: Use image node_id 5 for calling the TrainTest obj's underlying member method code with example usage: obj.test_decode_batch() without return types