code: def __len__(self):
      return self.dataset_size // self.total_batch_size
  
file_path: insightface/recognition/arcface_oneflow/utils/ofrecord_data_utils.py
imports: import oneflow
  import oneflow.nn
  import os
  from typing import List, Union
label_desc: Use image node_id 2 for calling the OFRecordDataLoader obj's underlying member method code with example usage: obj.__len__() and returns: unknown