docs: public TagKind getTagKind() {
      if (htmlTagNode instanceof HtmlOpenTagNode) {
        HtmlOpenTagNode openTagNode = (HtmlOpenTagNode) htmlTagNode;
        if (openTagNode.isSelfClosing() || openTagNode.getTagName().isDefinitelyVoid()) {
          return TagKind.VOID_TAG;
        }
        return TagKind.OPEN_TAG;
      } else {
        return TagKind.CLOSE_TAG;
      }
    }