void commitClusterState(ClusterStateChange newState, Address initiator, UUID txnId) {
        commitClusterState(newState, initiator, txnId, false);
    }
@Test(expected = NullPointerException.class)
    public void test_changeLocalClusterState_nullState() throws Exception {
        clusterStateManager.commitClusterState(null, newAddress(), TXN);
    }