Sylius\Bundle\ProductBundle\Form\DataTransformer\ProductsToProductAssociationsTransformer::transform PHP Method

    public function transform($productAssociations)
    {
        $this->setProductAssociations($productAssociations);
        if (null === $productAssociations) {
            return '';
        }
        $values = [];
        /** @var ProductAssociationInterface $productAssociation */
        foreach ($productAssociations as $productAssociation) {
            $productIdsAsString = $this->getIdsAsStringFromProducts($productAssociation->getAssociatedProducts());
            $values[$productAssociation->getType()->getCode()] = $productIdsAsString;
        }
        return $values;
    }