code: def __getitem__(self, index):
      return index
  
file_path: fairseq/fairseq/benchmark/dummy_dataset.py
imports: import numpy
  from fairseq.data import FairseqDataset
label_desc: Use image node_id 2 for calling the DummyDataset obj's underlying member method code with example usage: obj.__getitem__(index) and returns: index