code: def __init__(self, batch, num_items, item_size):
      super().__init__()
      self.batch = batch
      self.num_items = num_items
      self.item_size = item_size
  
file_path: fairseq/fairseq/benchmark/dummy_dataset.py
imports: import numpy
  from fairseq.data import FairseqDataset
label_desc: Use image node_id 1 to create a new DummyDataset object from inherited base classes: FairseqDataset with example: obj = DummyDataset(batch, num_items, item_size)