code: def _get_used_buffers(self):
      return self.buffers[: self.current_index + 1]
  
imports: import torch
  from deepspeed.utils.logging import logger
  from deepspeed import comm
label_desc: Use image node_id 12 for calling the SwapBufferPool obj's underlying member method code with example usage: obj._get_used_buffers() and returns: self