/**
 * @Eccube\EntityExtension("Eccube\Entity\Customer")
 */
trait CustomerTrait
{
    /**
     * 紹介者
     * @var integer
     *
     * @ORM\ManyToOne(targetEntity="\Eccube\Entity\Customer")
     * @ORM\JoinColumns({
     *   @ORM\JoinColumn(name="parent_customer_id", referencedColumnName="id")
     * })
     * @Eccube\FormAppend(
     *     auto_render=false,
     *     type="Symfony\Bridge\Doctrine\Form\Type\EntityType",
     *     options={
     *          "class": Customer::class,
     *          "required": false,
     *          "label": "紹介者",
     *          "mapped": false
     *     })
     */
    private $ParentCustomer;