code: def sizes(self):
      return np.array([self.item_size] * self.num_items)
  
file_path: fairseq/fairseq/benchmark/dummy_dataset.py
imports: import numpy
  from fairseq.data import FairseqDataset
label_desc: Use image node_id 5 for calling the DummyDataset obj's underlying member method code with example usage: obj.sizes() and returns: np