docs: @Override
      public String getRequestURI() {
  
          if (m_requestUri != null) {
              return m_requestUri;
          }
          StringBuffer buf = new StringBuffer(128);
          buf.append(OpenCms.getSystemInfo().getOpenCmsContext());
          buf.append(getElementUri());
          m_requestUri = buf.toString();
          return m_requestUri;
      }