code: def device(self, device_index=None):
      return torch.xpu.device(device_index)
  
imports: import torch
  from deepspeed.accelerator.abstract_accelerator import DeepSpeedAccelerator
  import intel_extension_for_pytorch
  import oneccl_bindings_for_pytorch
label_desc: Use image node_id 4 for calling the XPU_Accelerator obj's underlying member method code with example usage: obj.device(device_index) and returns: torch