protected Collection<String> getHttpMethods(final JsonObject pathInfo) {
        Set<String> httpMethodList = pathInfo.keySet();
        List<String> retList = new ArrayList<>(httpMethodList);
        Collections.sort(retList);
        return retList;
    }
parseJson.

@param docRoot docRoot
@return DocInfo
shenyu-admin/src/main/java/org/apache/shenyu/admin/service/manager/impl/SwaggerDocParser.java