code: def synchronize_pull(self) -> Tensor:
      # Synchronize the next pull command:
      idx = self._pull_queue[0][0]
      synchronize()
      torch.cuda.synchronize(self._pull_stream(idx))
      return self._cuda_buffer(idx)
  
imports: from typing import Optional, Callable
  import torch
  from torch import Tensor
  from torch.cuda import Stream
  from dig_ext.sync import synchronize, read_async, write_async
label_desc: Use image node_id 9 for calling the AsyncIOPool obj's underlying member method code with example usage: obj.synchronize_pull() and returns: self