code: def prefetch(self, indices):
      if self.src_dataset.supports_prefetch:
          self.src_dataset.prefetch(indices)
  
imports: import numpy
  import torch
  from fairseq.data import data_utils
label_desc: Use image node_id 5 for calling the NoisingDataset obj's underlying member method code with example usage: obj.prefetch(indices) without return types