    <code><a href="#subtract"><span class="identifier">subtract</span></a> (duration:<a class="type" title="" href="../npm/moment/Duration.html">Duration</a>):<a class="type" title="" href="../npm/Moment.html">Moment</a>        </code></p></h3><div class="doc"><p></p></div></div>                                                                                                                            <div class="field"><a name="year"></a><h3><p>        <code><a href="#year"><span class="identifier">year</sp