               this.container.setAttribute('aria-hidden', 'true');
                     return this;
                 },


                 onAdd: function () {
                     return this.container;
                 },

                 addTo: function (map) {
                     this._map = map;

                     for(var i = 0; i < this._buttons.length; i++){
                         this._buttons[i]._map = map;
                     }

                     var container = this._container = this.