code: def __len__(self):
      if self.drop_last:
          return self.total_urls // self.data_parallel_size
      else:
          return (
              self.total_urls + self.data_parallel_size - 1
          ) // self.data_parallel_size
  
file_path: NeMo/nemo/collections/multimodal/data/common/data_samplers.py
imports: from multiprocessing import Value
  import torch
  from nemo.utils import logging
label_desc: Use image node_id 2 for calling the WDSUrlsRandomSampler obj's underlying member method code with example usage: obj.__len__() and returns: unknown, unknown