code: def test_empty_data(self):
      instances = [
          get_empty_instance(200, 250),
          get_empty_instance(200, 249),
      ]
      self._test_eval([(200, 250), (200, 249)])
      self._test_train([(200, 250), (200, 249)], instances)
  
imports: import itertools
  import unittest
  from contextlib import contextmanager
  from copy import deepcopy
  import torch
  from detectron2.structures import BitMasks, Boxes, ImageList, Instances
  from detectron2.utils.events import EventStorage
  from detectron2.utils.testing import get_model_no_weights
label_desc: Use image node_id 6 for calling the InstanceModelE2ETest obj's underlying member method code with example usage: obj.test_empty_data() without return types