src/Exception/DistanceMatrixException.php
public static function invalidDistanceMatrixRequestTravelMode()
    {
        $travelModes = array_diff(TravelMode::getTravelModes(), array(TravelMode::TRANSIT));

        return new static(sprintf(
            'The distance matrix request travel mode can only be : %s.',
            implode(', ', $travelModes)
        ));
    }
public static function invalidDistanceMatrixRequestTravelMode()
    {
        $travelModes = array_diff(TravelMode::getTravelModes(), array(TravelMode::TRANSIT));

        return new static(sprintf(
            'The distance matrix request travel mode can only be : %s.',
            implode(', ', $travelModes)
        ));
    }
Gets the "INVALID DISTANCE MATRIX REQUEST TRAVEL MODE" exception.

@return \Ivory\GoogleMap\Exception\DistanceMatrixException The "INVALID DISTANCE MATRIX REQUEST TRAVEL MODE" exception.