public static String toOSStyleKey(String key) {
        key = key.toUpperCase().replaceAll(DOT_REGEX, UNDERLINE_SEPARATOR);
        if (!key.startsWith("DUBBO_")) {
            key = "DUBBO_" + key;
        }
        return key;
    }
@Test
    void testToOSStyleKey() {
        assertEquals("DUBBO_TAG1", StringUtils.toOSStyleKey("dubbo_tag1"));
        assertEquals("DUBBO_TAG1", StringUtils.toOSStyleKey("dubbo.tag1"));
        assertEquals("DUBBO_TAG1_TAG11", StringUtils.toOSStyleKey("dubbo.tag1.tag11"));
        assertEquals("DUBBO_TAG1", StringUtils.toOSStyleKey("tag1"));
    }