rem: this.contains = function(key){ var entry = findEntry(key); return !(entry == null || entry instanceof NullKey); } 
add: contains : function(key){ var entry = this.findEntry(key); return !(entry === null || entry instanceof NullKey); }, 
context:     this.contains = function(key){       var entry = findEntry(key);       return !(entry == null || entry instanceof NullKey);    }
meta: 8932	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/8932/f526bb9863fd46c554c216bca02d40198da13e02/log4js.js/buggy/trunk/src/js/log4js.js