old_contents: from .language_modeling import LanguageModelingDataset
  from .language_modeling import WikiText2
  from .snli import SNLI
  from .sentiment import SST
  from .translation import TranslationDataset
  
new_contents: from .language_modeling import LanguageModelingDataset, WikiText2
  from .snli import SNLI
  from .sentiment import SST
  from .translation import TranslationDataset
  
  
  __all__ = ['LanguageModelingDataset',
             'SNLI',
             'SST',
             'TranslationDataset',
             'WikiText2']
  
subject: Add __all__ to datasets __init__.py