Email.php

<?php

namespace App\Entity;

class Email
{
    private ?int $id;
    private string $email;

    public function __construct(?int $id, string $email)
    {
        $this->id = $id;
        $this->email = strtolower($email);
    }

    public function getId(): ?int
    {
        return $this->id;
    }

    public function returnNonNullId(): int
    {
        if (null === $this->id) {
            throw new \LogicException(sprintf('id should not be null for Email %s', $this->email));
        }

        return $this->id;
    }

    public function setId(int $id): void
    {
        $this->id = $id;
    }

    public function getEmail(): string
    {
        return $this->email;
    }
}