code: def dtype(self) -> Union[str, torch.dtype]:
      return self._dtype
  
file_path: pytorch-lightning/src/lightning/fabric/utilities/device_dtype_mixin.py
imports: from typing import Any, List, Optional, Union
  import torch
  from torch.nn import Module
  from typing_extensions import Self, override
label_desc: Use image node_id 2 for calling the _DeviceDtypeModuleMixin obj's underlying member method code with example usage: obj.dtype() and returns: self