code: def __len__(self):
      return self.size
  
file_path: datasets/benchmarks/benchmark_getitem_100B.py
imports: import json
  import os
  from dataclasses import dataclass
  import numpy
  import pyarrow
  import datasets
  from utils import get_duration
label_desc: Use image node_id 3 for calling the RandIter obj's underlying member method code with example usage: obj.__len__() and returns: self