code: public String outerHtml() {
          StringBuilder accum = StringUtil.borrowBuilder();
          outerHtml(accum);
          return StringUtil.releaseBuilder(accum);
      }
docs: Get the outer HTML of this node. For example, on a {@code p} element, may return {@code <p>Para</p>}.
  @return outer HTML
  @see Element#html()
  @see Element#text()