if ((source != null)&&(source.equals("true"))) {
if ("true".equals(source)) {
    public static void readPropertyLogStackTrace() {        String source = System.getProperty(SmartFrogCoreProperty.propLogStackTrace);        if ((source != null)&&(source.equals("true"))) {            Logger.logStackTrace = true;            Logger.log(MessageUtil.                    formatMessage(MSG_WARNING_STACKTRACE_ENABLED));        }    }