Function fetch

packages/main/test/pages/diffable-html.js:4025–4029

(what, where, recurse)

        return DomUtils.getElementsByTagName(what, where, true, 1)[0];
    }
    function fetch(what, where, recurse){
        return DomUtils.getText(
            DomUtils.getElementsByTagName(what, where, recurse, 1)
        ).trim();
    }

    function addConditionally(obj, prop, what, where, recurse){
        var tmp = fetch(what, where, recurse);