ap.prototype.includes( <var>searchElement</var> )</a></li><li><span class="item-toggle-none"></span><a href="#Map.prototype.reduce" title="Map.prototype.reduce( callbackfn [ , initialValue ] )"><span class="secnum">3.10</span> Map.prototype.reduce( <var>callbackfn</var> [ , <var>initialValue</var> ] )</a></li><li><span class="item-toggle-none"></span><a href="#Map.prototype.merge" title="Map.prototype.merge(... iterables )"><span class="secnum">3.11</span> Map.prototype.merge(... <var>iterables</var> )</a><