protected boolean isClusterVersionUnknownOrLessOrEqual(Version version) {
        Version clusterVersion = getNodeEngine().getClusterService().getClusterVersion();
        return clusterVersion.isUnknownOrLessOrEqual(version);
    }
@Test
    public void testClusterVersion_isUnknownLessOrEqual_currentVersion() {
        assertTrue(object.isClusterVersionUnknownOrLessOrEqual(CURRENT_CLUSTER_VERSION));
    }