<https://wpsites.net/genesis-tutorials/slide-in-vertical-nav-menu-widget-for-genesis-themes-with-fixed-header/>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://wpsites.net/genesis-tutorials/slide-in-vertical-nav-menu-widget-for-genesis-themes-with-fixed-header/>