code: def release_shard(self):
      del self.train_dataloader
      self.pool.shutdown()
  
imports: import os
  import random
  import time
  from concurrent.futures import ProcessPoolExecutor
  import h5py
  import numpy
  import torch
  import torch.distributed
  from bert_dataset_provider import BertDatasetProviderInterface
  from torch.utils.data import DataLoader, Dataset
  from torch.utils.data.distributed import DistributedSampler
label_desc: Use image node_id 3 for calling the NvidiaBertDatasetProvider obj's underlying member method code with example usage: obj.release_shard() without return types