an event string and optional handler. If handler
is provided only that specific handler will be unbound.
Otherwise all handlers will be unbound.</p>             </td>             <td class="code">               <div class="highlight"><pre>  <span class="kc">off</span><span class="o">:</span> <span class="nf">(args...)-&gt;</span>
    <span class="nx">$</span><span class="p">(</span><span class="k">this</span><span class="p">).</span><span class="kc">off</span> <span class="nx">args</span><span class="p">...