public boolean isControllerId(int nodeId) {
        return quorumNodeIds.contains(nodeId);
    }
@Test
    public void testIsControllerId() {
        assertTrue(QUORUM_FEATURES.isControllerId(0));
        assertTrue(QUORUM_FEATURES.isControllerId(1));
        assertTrue(QUORUM_FEATURES.isControllerId(2));
        assertFalse(QUORUM_FEATURES.isControllerId(3));
    }