code: def collater(self, samples):
      return self.batch
  
imports: import logging
  import numpy
  import torch
  from fairseq.data import Dictionary, FairseqDataset
  from fairseq.tasks import LegacyFairseqTask, register_task
label_desc: Use image node_id 4 for calling the DummyDataset obj's underlying member method code with example usage: obj.collater(samples) and returns: self