class_docstr: Problem spec for Librispeech using clean and noisy data.
docstr: If true, we only generate training data and hold out shards for dev.
code: def use_train_shards_for_dev(self):
      """If true, we only generate training data and hold out shards for dev."""
      return False
  
imports: import os
  import tarfile
  from tensor2tensor.data_generators import generator_utils
  from tensor2tensor.data_generators import problem
  from tensor2tensor.data_generators import speech_recognition
  from tensor2tensor.utils import registry
  from tensorflow.compat.v1 import estimator
label_desc: Use image node_id 5 for calling the Librispeech obj's underlying member method code with example usage: obj.use_train_shards_for_dev() and returns: False