class FirstEntity
{
    /**
     * @var EntitySecond
     *
     * @ORM\OneToOne(targetEntity="EntitySecond")
     * @ORM\JoinColumn(name="entity_second", referencedColumnName="id", unique=false)
     */
    private $entitySecond;

     /**
     * @return EntitySecond
     */
    public function getConfirmingDoc(): EntitySecond
    {
        return $this->entitySecond;
    }

    /**
     * @param EntitySecond $entitySecond
     */
    public function setConfirmingDoc(EntitySecond $entitySecond): void
    {
        $this->entitySecond = $entitySecond;
    }

}