log4j-slf4j2-impl/src/main/java/org/apache/logging/slf4j/Log4jLogger.java [352:375]:
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    public void log(
            final Marker marker,
            final String fqcn,
            final int level,
            final String message,
            final Object[] params,
            final Throwable throwable) {
        final Level log4jLevel = getLevel(level);
        final org.apache.logging.log4j.Marker log4jMarker = markerFactory.getLog4jMarker(marker);

        if (!logger.isEnabled(log4jLevel, log4jMarker, message, params)) {
            return;
        }
        final Message msg;
        final Throwable actualThrowable;
        if (params == null) {
            msg = new SimpleMessage(message);
            actualThrowable = throwable;
        } else {
            msg = new ParameterizedMessage(message, params, throwable);
            actualThrowable = throwable != null ? throwable : msg.getThrowable();
        }
        logger.logMessage(fqcn, log4jLevel, log4jMarker, msg, actualThrowable);
    }
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log4j-slf4j-impl/src/main/java/org/apache/logging/slf4j/Log4jLogger.java [352:375]:
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    public void log(
            final Marker marker,
            final String fqcn,
            final int level,
            final String message,
            final Object[] params,
            final Throwable throwable) {
        final Level log4jLevel = getLevel(level);
        final org.apache.logging.log4j.Marker log4jMarker = markerFactory.getLog4jMarker(marker);

        if (!logger.isEnabled(log4jLevel, log4jMarker, message, params)) {
            return;
        }
        final Message msg;
        final Throwable actualThrowable;
        if (params == null) {
            msg = new SimpleMessage(message);
            actualThrowable = throwable;
        } else {
            msg = new ParameterizedMessage(message, params, throwable);
            actualThrowable = throwable != null ? throwable : msg.getThrowable();
        }
        logger.logMessage(fqcn, log4jLevel, log4jMarker, msg, actualThrowable);
    }
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