code: def test_to(self):
      x = Boxes(torch.rand(3, 4))
      self.assertEqual(x.to(device="cpu").tensor.device.type, "cpu")
  
imports: import json
  import math
  import numpy
  import unittest
  import torch
  from detectron2.structures import Boxes, BoxMode, pairwise_ioa, pairwise_iou
  from detectron2.utils.testing import reload_script_model
label_desc: Use image node_id 2 for calling the TestBoxes obj's underlying member method code with example usage: obj.test_to() without return types