code: def testMergeOutputArtifacts(
      self,
      original_artifacts: typing_utils.ArtifactMultiMap,
      updated_artifacts: typing_utils.ArtifactMultiMap,
      expected_merged_artifacts: typing_utils.ArtifactMultiMap,
  ):
      merged_output_artifacts = (
          merge_utils.merge_updated_output_artifacts(
              original_artifacts,
              _build_output_artifact_dict(updated_artifacts),
          )
      )
      self.assertArtifactMapsEqual(
          expected_merged_artifacts, merged_output_artifacts
      )
  
imports: from typing import Dict, Mapping, Optional, Sequence
  from absl.testing import parameterized
  import tensorflow
  from tfx import types
  from tfx.orchestration.portable import merge_utils
  from tfx.orchestration.portable import outputs_utils
  from tfx.types import standard_artifacts
  from tfx.utils import test_case_utils
  from tfx.utils import typing_utils
  from ml_metadata.proto import metadata_store_pb2
label_desc: Use image node_id 7 for calling the MergeUtilsTest obj's underlying member method code with example usage: obj.testMergeOutputArtifacts(original_artifacts, updated_artifacts, expected_merged_artifacts) without return types