docs: private boolean routeVerify(RouteMeta meta) {
          String path = meta.getPath();
  
          if (StringUtils.isEmpty(path) || !path.startsWith("/")) {   // The path must be start with '/' and not empty!
              return false;
          }
  
          if (StringUtils.isEmpty(meta.getGroup())) { // Use default group(the first word in path)
              try {
                  String defaultGroup = path.substring(1, path.indexOf("/", 1));
                  if (StringUtils.isEmpty(defaultGroup)) {
                      return false;
                  }
  
                  meta.setGroup(defaultGroup);
                  return true;
              } catch (Exception e) {
                  logger.error("Failed to extract default group! " + e.getMessage());
                  return false;
              }
          }
  
          return true;
      }