code: static final String path(Element element) {
          StringBuilder sb = new StringBuilder();
  
          Node iterator = element;
          while (iterator.getNodeType() == Node.ELEMENT_NODE) {
              sb.insert(0, $(iterator).tag());
              sb.insert(0, "/");
  
              iterator = iterator.getParentNode();
          }
  
          return sb.toString();
      }
docs: Return an path expression describing an element