code: public void log(String callerFQCN, Priority level, Object message, Throwable t) {
          if (repository.isDisabled(level.level)) {
              return;
          }
          if (level.isGreaterOrEqual(this.getEffectiveLevel())) {
              forcedLog(callerFQCN, level, message, t);
          }
      }
docs: This is the most generic printing method. It is intended to be invoked by <b>wrapper</b> classes.
  
  @param callerFQCN The wrapper class' fully qualified class name.
  @param level The level of the logging request.
  @param message The message of the logging request.
  @param t The throwable of the logging request, may be null.