docs: private String exportCloseLink() {
  
          String closeLink = null;
          if (getRequest().getAttribute(I_CmsDialogConstants.ATTR_CLOSE_LINK) != null) {
              closeLink = (String)getRequest().getAttribute(I_CmsDialogConstants.ATTR_CLOSE_LINK);
          }
          if (CmsStringUtil.isEmptyOrWhitespaceOnly(closeLink)) {
              closeLink = CmsWorkplace.FILE_EXPLORER_FILELIST;
          }
  
          StringBuffer sb = new StringBuffer();
          // var closeLink = '/system/workplace/views/explorer/explorer_files.jsp';
          sb.append(wrapScript("var ", I_CmsDialogConstants.ATTR_CLOSE_LINK, " = \'", closeLink, "\';"));
          return sb.toString();
      }