code: def test_get_returns_model(self):
      model = model_zoo.get(
          "Misc/scratch_mask_rcnn_R_50_FPN_3x_gn.yaml", trained=False
      )
      self.assertIsInstance(model, GeneralizedRCNN)
      self.assertIsInstance(model.backbone, FPN)
  
file_path: detectron2/tests/test_model_zoo.py
imports: import logging
  import unittest
  from detectron2 import model_zoo
  from detectron2.config import instantiate
  from detectron2.modeling import FPN, GeneralizedRCNN
label_desc: Use image node_id 1 for calling the TestModelZoo obj's underlying member method code with example usage: obj.test_get_returns_model() without return types