public void fatal(Object message, Throwable t) {
        differentiatedLog(FATAL_MARKER, CATEGORY_FQCN, LocationAwareLogger.ERROR_INT, message, t);
    }
Delegates to {@link org.slf4j.Logger#error(String,Throwable)} method in
SLF4J. In addition, the call is marked with a marker named "FATAL".

@param message a message to log
@param t       a throwable to log
log4j-over-slf4j/src/main/java/org/apache/log4j/Category.java