code: def test_stringify_slice_key(self, slices, expected_result):
      result = graphics.stringify_slice_key(slices)
      self.assertEqual(result, expected_result)
  
imports: from absl.testing import absltest, parameterized
  from model_card_toolkit.utils import graphics
label_desc: Use image node_id 1 for calling the GraphicsTest obj's underlying member method code with example usage: obj.test_stringify_slice_key(slices, expected_result) without return types