<?phpnamespace App\Entity;use App\Entity\SchoolYear;use App\Repository\PaymentRepository;use Doctrine\Common\Collections\ArrayCollection;use Doctrine\Common\Collections\Collection;use Doctrine\ORM\Mapping as ORM;/** * PaymentPlan * * @ORM\Table(name="payment_plan") * @ORM\Entity(repositoryClass=PaymentRepository::class) */class PaymentPlan{      /**     * @var int     *     * @ORM\Column(name="id", type="integer")     * @ORM\Id     * @ORM\GeneratedValue(strategy="AUTO")     */    private $id;    /**     * @ORM\OneToOne(targetEntity=SchoolYear::class,inversedBy="paymentPlan")     * @ORM\JoinColumn(name="school_year_id", referencedColumnName="id", nullable=true)     */    private $schoolYear;            /**     * @ORM\OneToMany(targetEntity=Installment::class, mappedBy="paymentPlan")     */    private $installments;       /**     * @ORM\Column(type="integer", options={"default" = 0})     *       */    private $weight;       public function __construct()    {        $this->payments = new ArrayCollection();        $this->installments = new ArrayCollection();        $this->weight = 1;    }    public function getId(): ?int    {        return $this->id;    }    public function getSchoolYear(): ?SchoolYear    {        return $this->schoolYear;    }    public function setSchoolYear(?SchoolYear $schoolYear): static    {        $this->schoolYear = $schoolYear;        return $this;    }         /**     * @return Collection<int, Installment>     */    public function getInstallments(): Collection    {        return $this->installments;    }    public function addInstallment(Installment $installment): static    {        if (!$this->installments->contains($installment)) {            $this->installments->add($installment);              }        return $this;    }    public function removeInstallment(Installment $installment): static    {        $this->installments->removeElement($installment);        return $this;    }    public function getWeight(): ?int    {        return $this->weight;    }    public function setWeight(int $weight): self    {        $this->weight = $weight;        return $this;    }}