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