rem: this.events.destroy(); 
add: if (this.events) { this.events.destroy(); } 
context:     destroy: function(setNewBaseLayer) {        if (setNewBaseLayer == null) {            setNewBaseLayer = true;        }        if (this.map != null) {            this.map.removeLayer(this, setNewBaseLayer);        }        this.map = null;        this.name = null;        this.div = null;        this.options = null;                this.events.destroy();        this.events = null;    },
meta: 1027	/local1/tlutelli/issta_data/temp/all_js/javascript/2007_temp/2007/1027/895ba639ae7aaa9dea32beb6f2408d5c9ee681c7/Layer.js/clean/lib/OpenLayers/Layer.js