code: public String paramo(String name) {
          String ret = routeResult.pathParams().get(name);
          if (ret != null) {
              return ret;
          }
  
          if (bodyParams != null && bodyParams.containsKey(name)) {
              return bodyParams.get(name).get(0);
          }
  
          ret = routeResult.queryParam(name);
          if (ret != null) {
              return ret;
          }
  
          return null;
      }
docs: Order: path, body, query
  <p>
  When there's no param, this method will return null. See also method <code>param</code>.