public function getSystemLogger($name = LoggerKeys::SYSTEM)
    {

        // query whether or not, the requested logger is available
        if (isset($this->systemLoggers[$name])) {
            return $this->systemLoggers[$name];
        }

        // throw an exception if the requested logger is NOT available
        throw new \Exception(sprintf('The requested logger \'%s\' is not available', $name));
    }