nu-toc"><ol class="toc"><li><span class="item-toggle-none"></span><a href="#formalities" title="Formal informations"><span class="secnum">1</span> Formal informations</a></li><li><span class="item-toggle">+</span><a href="#Set.prototype" title="Set.prototype methods"><span class="secnum">2</span> Set.prototype methods</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#Set.prototype.filter" title="Set.prototype.filter( callbackfn [ , thisArg ] )"><span class="secnum">2.1</span> Set.protot