code: def _test_hparams_set(self, hparams_set):
      hparams = registry.hparams(hparams_set)
      FLAGS.output_dir = tf.test.get_temp_dir()
      trainer_model_free.train(
          hparams, FLAGS.output_dir, env_problem_name=None
      )
  
file_path: tensor2tensor/tensor2tensor/rl/trainer_model_free_test.py
imports: from __future__ import absolute_import
  from __future__ import division
  from __future__ import print_function
  from tensor2tensor.rl import trainer_model_free
  from tensor2tensor.utils import registry
  import tensorflow.compat.v1
label_desc: Use image node_id 1 for calling the TrainTest obj's underlying member method code with example usage: obj._test_hparams_set(hparams_set) without return types