code: def _get_bucket_size(self, element_size: int) -> int:
      if self.bucket_size_mb <= 0:  # Values <= 0 disable bucketing.
          return 0
      MB = 1024 * 1024
      bucket_size = self.bucket_size_mb * MB / element_size
      return int(bucket_size)
  
file_path: ColossalAI/colossalai/legacy/nn/parallel/reducer.py
imports: import functools
  from typing import Callable, Dict, List, Optional, Tuple
  import torch
  import torch.distributed
  from torch import Tensor
  from torch.distributed import ProcessGroup
label_desc: Use image node_id 5 for calling the Reducer obj's underlying member method code with example usage: obj._get_bucket_size(element_size) and returns: int, int