Customer.php

<?php

namespace EasyCorp\Bundle\EasyAdminBundle\Tests\Functional\Apps\DefaultApp\Entity;

use Doctrine\Common\Collections\ArrayCollection;
use Doctrine\Common\Collections\Collection;
use Doctrine\ORM\Mapping as ORM;

#[ORM\Entity]
#[ORM\Table(name: '`customer`')]
class Customer
{
    #[ORM\Id]
    #[ORM\GeneratedValue]
    #[ORM\Column(type: 'integer')]
    private ?int $id = null;

    #[ORM\Column(type: 'string', length: 255)]
    private ?string $name = null;

    #[ORM\ManyToMany(targetEntity: Bill::class, mappedBy: 'customers')]
    private Collection $bills;

    public function __construct()
    {
        $this->bills = new ArrayCollection();
    }

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

    public function getName(): ?string
    {
        return $this->name;
    }

    public function setName($name): self
    {
        $this->name = $name;

        return $this;
    }

    /**
     * @return Collection|Bill[]
     */
    public function getBills(): Collection
    {
        return $this->bills;
    }

    public function addBill(Bill $bill): self
    {
        if (!$this->bills->contains($bill)) {
            $this->bills[] = $bill;
            $bill->addCustomer($this);
        }

        return $this;
    }

    public function removeBill(Bill $bill): self
    {
        if ($this->bills->removeElement($bill)) {
            $bill->addCustomer($this);
        }

        return $this;
    }
}