code: def testMaskRCNNGPU(self):
      self._test_model(
          "COCO-InstanceSegmentation/mask_rcnn_R_50_FPN_3x.yaml",
          device="cuda",
      )
  
file_path: detectron2/tests/test_export_caffe2.py
imports: import copy
  import os
  import tempfile
  import unittest
  import torch
  from torch.hub import _check_module_exists
  from detectron2 import model_zoo
  from detectron2.utils.logger import setup_logger
  from detectron2.utils.testing import get_sample_coco_image
label_desc: Use image node_id 4 for calling the TestCaffe2Export obj's underlying member method code with example usage: obj.testMaskRCNNGPU() without return types