code: def supports_prefetch(self):
      return getattr(self.dataset, "supports_prefetch", False)
  
imports: import logging
  import math
  from typing import List, Optional, NamedTuple
  import numpy
  import torch
  from fairseq.data import ConcatDataset, LanguagePairDataset, FileAudioDataset, data_utils
  from fairseq.data import FairseqDataset
label_desc: Use image node_id 11 for calling the LangPairMaskDataset obj's underlying member method code with example usage: obj.supports_prefetch() and returns: getattr