/**
* @param Coupon $coupon The coupon object to add.
*/
protected function doAddCoupon($coupon)
{
$couponCountry = new ChildCouponCountry();
$couponCountry->setCoupon($coupon);
$this->addCouponCountry($couponCountry);
// set the back reference to this object directly as using provided method either results
// in endless loop or in multiple relations
if (!$coupon->getCountries()->contains($this)) {
$foreignCollection = $coupon->getCountries();
$foreignCollection[] = $this;
}
}
