Support listeners and/or interceptors for `DomElement` `click` and `type`
Imagine you are using a TreeWalker and you want to switch off of whether an element...
Consider the following HTML: <div class="register-switch"> <input type="radio" name="someFlag"...
Excellent!
Add HtmlHeading class/interface
Support custom HtmlElement
Oh, I just realized that the same should be applied to getElementsByTagNameNS...
SgmlPage: implement org.w3c.dom.traversal.DocumentTraversal