code: def synchronize(device: _device_t = None) -> None:
      r"""Waits for all kernels in all streams on the CPU device to complete.
  
      Args:
          device (torch.device or int, optional): ignored, there's only one CPU device.
  
      N.B. This function only exists to facilitate device-agnostic code.
      """
      pass
  
imports: from contextlib import AbstractContextManager
  from typing import Any, Optional, Union
  import torch
  from ..None import device
  from .None import amp
label_desc: Use image node_id 3 for calling a global function with example usage: synchronize(device) without return types