code: public void addImportExportHandler(I_CmsImportExportHandler handler) {
  
          if (LOG.isDebugEnabled()) {
              LOG.debug(Messages.get().getBundle().key(Messages.LOG_IMPORTEXPORT_ADDED_IMPORTEXPORT_HANDLER_1, handler));
          }
          m_importExportHandlers.add(handler);
      }
docs: Adds an import/export handler to the list of configured handlers.<p>
  
  @param handler the import/export handler to add