code: def test_manually_set_iou_thrs(self):
      # create dummy data
      fake_json_file = osp.join(self.tmp_dir.name, "fake_data.json")
      self._create_dummy_coco_json(fake_json_file)
  
      # test single coco dataset evaluation
      coco_metric = CocoMetric(
          ann_file=fake_json_file, metric="bbox", iou_thrs=[0.3, 0.6]
      )
      coco_metric.dataset_meta = dict(classes=["car", "bicycle"])
      self.assertEqual(coco_metric.iou_thrs, [0.3, 0.6])
  
imports: import os.path
  import tempfile
  from unittest import TestCase
  import numpy
  import pycocotools.mask
  import torch
  from mmengine.fileio import dump
  from mmdet.evaluation import CocoMetric
label_desc: Use image node_id 8 for calling the TestCocoMetric obj's underlying member method code with example usage: obj.test_manually_set_iou_thrs() without return types