code: def testReconstructArtifactMultimap_EmptyEvents(self):
      result = event_lib.reconstruct_artifact_multimap(
          artifacts=[], events=[]
      )
      self.assertEmpty(result)
  
imports: import itertools
  from absl.testing import parameterized
  import tensorflow
  from tfx.orchestration.portable.mlmd import event_lib
  from ml_metadata.proto import metadata_store_pb2
label_desc: Use image node_id 5 for calling the EventLibTest obj's underlying member method code with example usage: obj.testReconstructArtifactMultimap_EmptyEvents() without return types