private String getMessageI18N(LogRecord record) {
    String message = record.getMessage();

    if (message == null) {
        return null;
    }
    // [..]
}

private String getMessageI18N(LogRecord record) {
    String message = record.getMessage(); // can be null!
    // this is a check to avoid calling the underlying logging system
    // with a null message. While it is legitimate to invoke j.u.l. with
    // a null message, other logging frameworks do not support this.
    // see also http://jira.qos.ch/browse/SLF4J-99

    if (message == null) {
        return "";
    }
    // [..]
}

public void publish(LogRecord record) {
    // Silently ignore null records.
    if (record == null) {
        return;
    }

    Logger slf4jLogger = getSLF4JLogger(record);
    String message = record.getMessage(); // can be null!
    // this is a check to avoid calling the underlying logging system
    // with a null message. While it is legitimate to invoke j.u.l. with
    // a null message, other logging frameworks do not support this.
    // see also http://jira.qos.ch/browse/SLF4J-99
    if (message == null) {
        message = "";
    }
    if (slf4jLogger instanceof LocationAwareLogger) {
        callLocationAwareLogger((LocationAwareLogger) slf4jLogger, record);
    } else {
        callPlainSLF4JLogger(slf4jLogger, record);
    }
}

public void publish(LogRecord record) {
    // Silently ignore null records.
    if (record == null) {
        return;
    }

    Logger slf4jLogger = getSLF4JLogger(record);
    if (slf4jLogger instanceof LocationAwareLogger) {
        callLocationAwareLogger((LocationAwareLogger) slf4jLogger, record);
    } else {
        callPlainSLF4JLogger(slf4jLogger, record);
    }
}