docs: public String wholeText() {
          final StringBuilder accum = StringUtil.borrowBuilder();
          NodeTraversor.traverse(new NodeVisitor() {
              public void head(Node node, int depth) {
                  if (node instanceof TextNode) {
                      TextNode textNode = (TextNode) node;
                      accum.append(textNode.getWholeText());
                  }
              }
  
              public void tail(Node node, int depth) {
              }
          }, this);
  
          return StringUtil.releaseBuilder(accum);
      }