rem: this.size = function() { return keys.length; }; 
add: size : function() { return this.keys.length; }, 
context:     this.size = function() {    	return keys.length;    };
meta: 8932	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/8932/f526bb9863fd46c554c216bca02d40198da13e02/log4js.js/buggy/trunk/src/js/log4js.js