code: def test_load_model(self):
      from sahi.models.mmdet import MmdetDetectionModel
  
      download_mmdet_cascade_mask_rcnn_model()
  
      mmdet_detection_model = MmdetDetectionModel(
          model_path=MmdetTestConstants.MMDET_CASCADEMASKRCNN_MODEL_PATH,
          config_path=MmdetTestConstants.MMDET_CASCADEMASKRCNN_CONFIG_PATH,
          confidence_threshold=CONFIDENCE_THRESHOLD,
          device=MODEL_DEVICE,
          category_remapping=None,
          load_at_init=True,
      )
  
      self.assertNotEqual(mmdet_detection_model.model, None)
  
file_path: sahi/tests/test_mmdetectionmodel.py
imports: import unittest
  import numpy
  from sahi.utils.cv import read_image
  from sahi.utils.file import download_from_url
  from sahi.utils.mmdet import MmdetTestConstants, download_mmdet_cascade_mask_rcnn_model, download_mmdet_yolox_tiny_model
label_desc: Use image node_id 1 for calling the TestMmdetDetectionModel obj's underlying member method code with example usage: obj.test_load_model() without return types