public static void checkParam(String dataId, String group, String content) throws NacosException {
        checkKeyParam(dataId, group);
        if (StringUtils.isBlank(content)) {
            throw new NacosException(NacosException.CLIENT_INVALID_PARAM, CONTENT_INVALID_MSG);
        }
    }
@Test
    void testCheckParam() throws NacosException {
        String dataId = "b";
        String group = "c";
        String content = "a";
        ParamUtils.checkParam(dataId, group, content);
    }