/**
* Sets if the the distance matrix request avoids hightways.
*
* @param boolean $avoidHighways TRUE if the distance matrix request avoids hightways else FALSE.
*
* @throws \Ivory\GoogleMap\Exception\DistanceMatrixException If the avoid highways flag is not valid.
*/
public function setAvoidHighways($avoidHighways = null)
{
if (!is_bool($avoidHighways) && $avoidHighways !== null) {
throw DistanceMatrixException::invalidDistanceMatrixRequestAvoidHighways();
}
$this->avoidHighways = $avoidHighways;
}
