@Override
    public boolean isWriteIndexAlias(String index) {
        return getWriteIndexAlias().equals(index);
    }
@Test
    public void testIsDeflectorAlias() {
        assertTrue(mongoIndexSet.isWriteIndexAlias("graylog_deflector"));
        assertFalse(mongoIndexSet.isWriteIndexAlias("graylog_foobar"));
        assertFalse(mongoIndexSet.isWriteIndexAlias("graylog_123"));
        assertFalse(mongoIndexSet.isWriteIndexAlias("HAHA"));
    }