text: # Copyright (c) Facebook, Inc. and its affiliates.
  #
  # This source code is licensed under the MIT license found in the
  # LICENSE file in the root directory of this source tree.
  
  from . import FairseqDataset
  
  
  class NumSamplesDataset(FairseqDataset):
      def __getitem__(self, index):
          return 1
  
      def __len__(self):
          return 0
  
      def collater(self, samples):
          return sum(samples)
  