HtmlHeadElement Class
https://html.spec.whatwg.org/multipage/semantics.html#htmlheadelement
public sealed class HtmlHeadElement : HtmlElement- Inheritance
HtmlElementHtmlHeadElement
https://html.spec.whatwg.org/multipage/semantics.html#htmlheadelement
public sealed class HtmlHeadElement : HtmlElementHtmlElement HtmlHeadElement