add: return to; 
context: OpenLayers.Util.applyDefaults = function (to, from) {    for (var key in from) {        if (to[key] == null) {            to[key] = from[key];        }    }};
meta: 4411	/local1/tlutelli/issta_data/temp/all_js/javascript/2007_temp/2007/4411/71358953914dc6f70e17360fba43f08bfaa5dad9/Util.js/buggy/lib/OpenLayers/Util.js