function withElementById(id, offdom) {
        assert.ok(types.isString(id), 'Expected String as parameter');
        var element = document.getElementById(id);
        if (element) {
            return new Builder(element, offdom);
        }
        return null;
    }
Create a new builder from the element that is uniquely identified by the given identifier. If the
 second parameter "offdom" is set to true, the created elements will only be added to the provided
 element when the build() method is called.