list.appendChild(segtitle);
        segtitle.appendChild(document.createTextNode("API Documentation"));
        Element listItem = document.createElement("seglistitem");
        list.appendChild(listItem);
        Element seg = document.createElement("seg");
        listItem.appendChild(seg);
        Element apilink = document.createElement("apilink");
        seg.appendChild(apilink);

    Otherwise, the first item (a `DefaultPlaceholder`) will be returned.
    """
    items = (first_item,) + extra_items
    for item in items:
        if not isinstance(item, DefaultPlaceholder):
            return item