observer = new Observer(); monitoredFiles = new NSMutableArray();
    public static void initialize() {        if(!isInitialized) {            isLocalizationEnabled = ERXProperties.booleanForKeyWithDefault("er.extensions.ERXLocalizer.isLocalizationEnabled", true);            if (isLocalizationEnabled) {                // To detect ERXLocalizer and its subclasses are recompiled at run-time.                 NSNotificationCenter.defaultCenter().addObserver(                        observer,                         new NSSelector("compilerProxyDidCompileClasses", ERXConstant.NotificationClassArray),                         ERXCompilerProxy.CompilerProxyDidCompileClassesNotification,                         null);            }            isInitialized = true;        }    }