protected function getSeverity($errorCode)
    {
        if (isset($this->severityMapping[$errorCode])) {
            return $this->severityMapping[$errorCode];
        } else {
            return $this->severityMapping[Logger::ERROR];
        }
    }
protected function getSeverity($errorCode)
    {
        if (isset($this->severityMapping[$errorCode])) {
            return $this->severityMapping[$errorCode];
        } else {
            return $this->severityMapping[Logger::ERROR];
        }
    }
Returns the Bugsnag severiry from a monolog error code.
@param int $errorCode - one of the Logger:: constants.
@return string