docs: private String getSiteRoot() {
  
          String res;
  
          if (m_simpleFieldSiteRoot.isVisible()) {
              res = m_simpleFieldSiteRoot.getValue();
          } else {
              res = "/" + ensureFoldername(getParentFolder()) + ensureFoldername(getFieldFolder());
              res = res.endsWith("/") ? res.substring(0, res.length() - 1) : res;
          }
          return res;
      }