="#Map" title="Map static methods"><span class="secnum">4</span> Map static methods</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#Map.keyBy" title="Map.keyBy( iterable, callbackfn)"><span class="secnum">4.1</span> Map.keyBy( <var>iterable</var>, <var>callbackfn</var>)</a></li></ol></li><li><span class="item-toggle-none"></span><a href="#WeakSet.prototype.addAll" title="WeakSet.prototype.addAll(...items)"><span class="secnum">5</span> WeakSet.prototype.addAll(...<var>items</var>)</a>