ef="http://php.net/Iterator"><abbr title="Iterator">Iterator</abbr></a>, <a href="http://php.net/Countable"><abbr title="Countable">Countable</abbr></a>, <a href="http://php.net/ArrayAccess"><abbr title="ArrayAccess">ArrayAccess</abbr></a></p>

            <div class="description">
            <p>The layers interface</p>
            <p>
</p>
        </div>
    
    
    
            <h2>Methods</h2>

            <table>
                    <tr>
                <td class="type">
                    
        