/**
* Sets the height unit size.
*
* @param string $heightUnit The height unit size.
*
* @throws \Ivory\GoogleMap\Exception\BaseException If the height unit is not valid.
*/
public function setHeightUnit($heightUnit)
{
if (!is_string($heightUnit) && $heightUnit !== null) {
throw BaseException::invalidSizeHeightUnit();
}
$this->heightUnit = $heightUnit;
}
