docs: @PrefMetadata(type = CmsTimeWarpPreference.class)
      public String getTimeWarp() {
  
          long warp = m_settings.getTimeWarp();
          return warp < 0 ? "" : "" + warp; // if timewarp < 0 (i.e. time warp is not set), use the empty string because we don't want the date selector widget to interpret the negative value
      }