code: private void skipResource(CmsResource res) {
  
          // add the file to the new sync list...
          String resname = m_cms.getSitePath(res);
          CmsSynchronizeList syncList = m_syncList.get(translate(resname));
          m_newSyncList.put(translate(resname), syncList);
          // .. and remove it from the old one
          m_syncList.remove(translate(resname));
          // update the report
          m_report.print(org.opencms.report.Messages.get().container(
              org.opencms.report.Messages.RPT_SUCCESSION_1,
              String.valueOf(m_count++)), I_CmsReport.FORMAT_NOTE);
          m_report.print(Messages.get().container(Messages.RPT_SKIPPING_0), I_CmsReport.FORMAT_NOTE);
          m_report.println(
              org.opencms.report.Messages.get().container(org.opencms.report.Messages.RPT_ARGUMENT_1, resname));
      }
docs: Updates the synchronization lists if a resource is not used during the
  synchronization process.<p>
  
  @param res the resource whose entry must be updated