docs: public String buildCheckContent() {
  
          StringBuffer retValue = new StringBuffer(256);
  
          retValue.append("<tr>\n\t<td colspan=\"3\" style=\"white-space: nowrap;\" unselectable=\"on\">");
          retValue.append("<input type=\"checkbox\" name=\"");
          retValue.append(PARAM_CONTENT);
          retValue.append("\" value=\"true\">&nbsp;");
          retValue.append(key(Messages.GUI_TOUCH_MODIFY_CONTENT_0));
          retValue.append("</td>\n</tr>\n");
          return retValue.toString();
      }