private static Stream<String> supportEleCodeKeys() {
        return Stream.of("loadBalanceEnums", "matchModeEnums", "pluginEnums", "pluginTypeEnums", "selectorTypeEnums",
                "serializeEnums", "wafEnums", "redisModeEnums", "hystrixIsolationModeEnums");
    }
test element support.

@param key element key
shenyu-admin/src/test/java/org/apache/shenyu/admin/service/EnumServiceTest.java