code: def __len__(self):
      return len(self.batch_sampler) // self.num_replicas
  
file_path: llama-recipes/src/llama_recipes/data/sampler.py
imports: import random
  from itertools import islice
  import numpy
  import torch
label_desc: Use image node_id 3 for calling the DistributedLengthBasedBatchSampler obj's underlying member method code with example usage: obj.__len__() and returns: unknown