code: def setUpClass(cls):
      init_default_scope("mmdet")
      cls.cfg = dict(
          type="InterpolateTracklets",
          min_num_frames=5,
          max_num_frames=20,
          use_gsi=True,
          smooth_tau=10,
      )
  
file_path: mmdetection/tests/test_models/test_task_modules/test_track/test_interpolation.py
imports: from unittest import TestCase
  import numpy
  from mmengine.registry import init_default_scope
  from mmdet.registry import TASK_UTILS
label_desc: Use image node_id 1 for calling the TestInterpolateTracklets obj's underlying member method code with example usage: obj.setUpClass(cls) without return types