@Override
    public int perServerWaterline() {
        return clientConfig.getPropertyAsInteger(PER_SERVER_WATERLINE, DEFAULT_PER_SERVER_WATERLINE);
    }
@Test
    void testPerServerWaterlineOverride() {
        clientConfig.set(PER_SERVER_WATERLINE, 5);
        assertEquals(5, connectionPoolConfig.perServerWaterline());
    }