code: def test_get_targets(self):
      targets = self.loss.get_targets(self.data_samples)
      for target in targets:
          self.assertEqual(len(target), 1)
  
file_path: mmocr/tests/test_models/test_textdet/test_module_losses/test_textsnake_module_loss.py
imports: from unittest import TestCase
  import numpy
  import torch
  from mmengine.structures import InstanceData
  from mmocr.models.textdet.module_losses import TextSnakeModuleLoss
  from mmocr.structures import TextDetDataSample
label_desc: Use image node_id 8 for calling the TestTextSnakeModuleLoss obj's underlying member method code with example usage: obj.test_get_targets() without return types