code: def test_combine_multi_defs(self):
      self.write_svgs([TEST_MALFORMED_A])
      with self.assertRaises(ValueError):
          self.combine_svgs([TEST_MALFORMED_A])
  
file_path: tensorboard/tensorboard/tools/mat_bundle_icon_svg_test.py
imports: import dataclasses
  import os
  from tensorboard import test
  from tensorboard.tools import mat_bundle_icon_svg
label_desc: Use image node_id 8 for calling the MatBundleIconSvgTest obj's underlying member method code with example usage: obj.test_combine_multi_defs() without return types