Module Dom.TreeWalker
let root: t => Dom.node;
let whatToShow: t => Webapi__Dom__Types.WhatToShow.t;
let filter: t => option(Dom.nodeFilter);
let currentNode: t => Dom.node;
let setCurrentNode: t => Dom.node => unit;
let parentNode: t => option(Dom.node);
let firstChild: t => option(Dom.node);
let lastChild: t => option(Dom.node);
let previousSibling: t => option(Dom.node);
let nextSibling: t => option(Dom.node);
let previousNode: t => option(Dom.node);
let nextNode: t => option(Dom.node);