private function exceptionFields(\Exception $exception)
    {
        return '|' . get_class($exception)
             . '|' . $exception->getMessage()
             . '|' . $exception->getFile()
             . '|' . $exception->getLine();
    }
private function exceptionFields(\Exception $exception)
    {
        return '|' . get_class($exception)
             . '|' . $exception->getMessage()
             . '|' . $exception->getFile()
             . '|' . $exception->getLine();
    }
returns fields for exception to log

@param   \Exception  $exception
@return  string