docs: public char[] getRawURIReference() {
          if (_fragment == null) { 
              return _uri;
          }
          if (_uri == null) { 
              return _fragment;
          }
          // if _uri != null &&  _fragment != null
          String uriReference = new String(_uri) + "#" + new String(_fragment);
          return uriReference.toCharArray();
      }