code: def testGroupByDisjointLineage_EmptyInput(self):
      self.assertEmpty(self._group_by_disjoint_lineage({}))
      self.assertEmpty(self._group_by_disjoint_lineage({"a": []}))
  
imports: import random
  from absl.testing import parameterized
  import tensorflow
  from tfx.dsl.input_resolution.ops import group_by_lineage_op
  from tfx.dsl.input_resolution.ops import test_utils
  from tfx.orchestration.portable.input_resolution import exceptions
  from tfx.types import artifact_utils
  from tfx.utils import test_case_utils
label_desc: Use image node_id 11 for calling the GroupByDisjointLineageTest obj's underlying member method code with example usage: obj.testGroupByDisjointLineage_EmptyInput() without return types