public Optional<ClusterState> loadClusterState() {
        String value = repository.query(ComputeNode.getClusterStateNodePath());
        return Strings.isNullOrEmpty(value) ? Optional.empty() : Optional.of(ClusterState.valueOf(value));
    }
@Test
    void assertLoadClusterStateClusterState() {
        new StatePersistService(repository).loadClusterState();
        verify(repository).query(ComputeNode.getClusterStateNodePath());
    }