" data-locator="third_sibling">Third</div>
                </div>
            </span>
        </div>
    </span>
    <div>
        <grandelement id="custom_grandparent">
            <parentelement id="custom_parent">
                <div id="regular_child"></div>
                <childelement id="custom_child" class="custom_child a"></childelement>
                <childelement class="custom_child b"></childelement>
                <childelement class="custom_child c"></childelement>
            </parentele