class_docstr: Helper class to merge final image on GPU. This generally faster than moving individual tiles to CPU.
code: def device(self) -> torch.device:
      return self.image.device
  
imports: import dataclasses
  import math
  from typing import List, Iterable, Tuple, Union, Sequence
  import cv2
  import numpy
  import torch
label_desc: Use image node_id 4 for calling the TileMerger obj's underlying member method code with example usage: obj.device() and returns: self