add: this.destroyFeatures(); 
context:     destroy: function() {        OpenLayers.Layer.prototype.destroy.apply(this, arguments);          // HACK HACK -- I believe we should be iterating and         //              calling feature[i].destroy() here.         this.features = null;        this.selectedFeatures = null;        if (this.renderer) {            this.renderer.destroy();        }        this.renderer = null;        this.geometryType = null;        this.drawn = null;    },
meta: 1027	/local1/tlutelli/issta_data/temp/all_js/javascript/2007_temp/2007/1027/7871d26df452ef1922f18f9cef15d59fc34777e1/Vector.js/clean/lib/OpenLayers/Layer/Vector.js