Entity/Offer.php
public function addOfferElement(\Dywee\OrderBundle\Entity\OfferElement $offerElements)
    {
        $this->offerElements[] = $offerElements;
        $offerElements->setOffer($this);
        return $this;
    }
public function addOfferElement(\Dywee\OrderBundle\Entity\OfferElement $offerElements)
    {
        $this->offerElements[] = $offerElements;
        $offerElements->setOffer($this);
        return $this;
    }
Add offerElements

@param \Dywee\OrderBundle\Entity\OfferElement $offerElements
@return Offer