public void log(LoggingEvent event) {
        Level log4jLevel = toLog4jLevel(event.getLevel().toInt());
        if (!logger.isEnabledFor(log4jLevel))
            return;

        org.apache.log4j.spi.LoggingEvent log4jevent = event2Log4jEvent(event, log4jLevel);
        logger.callAppenders(log4jevent);

    }
Called by {@link SubstituteLogger} or by {@link LoggingEventBuilder} instances
@param event
slf4j-reload4j/src/main/java/org/slf4j/reload4j/Reload4jLoggerAdapter.java