code: def testConsecutiveSpans_Empty(self):
      actual = self._consecutive_spans([])
      self.assertEqual(actual, [])
  
imports: from typing import Sequence
  import tensorflow
  from tfx import types
  from tfx.dsl.input_resolution.ops import ops
  from tfx.dsl.input_resolution.ops import test_utils
  from tfx.types import artifact
label_desc: Use image node_id 3 for calling the ConsecutiveSpansOpTest obj's underlying member method code with example usage: obj.testConsecutiveSpans_Empty() without return types