app/bundles/PointBundle/Entity/Group.php

<?php

namespace Mautic\PointBundle\Entity;

use Doctrine\ORM\Mapping as ORM;
use Mautic\ApiBundle\Serializer\Driver\ApiMetadataDriver;
use Mautic\CoreBundle\Doctrine\Mapping\ClassMetadataBuilder;
use Mautic\CoreBundle\Entity\FormEntity;
use Symfony\Component\Validator\Constraints as Assert;
use Symfony\Component\Validator\Mapping\ClassMetadata;

class Group extends FormEntity
{
    public const TABLE_NAME = 'point_groups';

    private ?int $id             = null;

    private ?string $name        = '';

    private ?string $description = '';

    /**
     * @param ORM\ClassMetadata<Group> $metadata
     */
    public static function loadMetadata(ORM\ClassMetadata $metadata): void
    {
        $builder = new ClassMetadataBuilder($metadata);

        $builder->setTable(self::TABLE_NAME)
            ->setCustomRepositoryClass(GroupRepository::class);

        $builder->addIdColumns();
    }

    public static function loadValidatorMetadata(ClassMetadata $metadata): void
    {
        $metadata->addPropertyConstraint('name', new Assert\NotBlank([
            'message' => 'mautic.core.name.required',
        ]));
    }

    public static function loadApiMetadata(ApiMetadataDriver $metadata): void
    {
        $metadata->setGroupPrefix('pointGroup')
            ->addListProperties(
                [
                    'id',
                    'name',
                    'description',
                ]
            )
            ->addProperties(
                [
                    'id',
                    'name',
                    'description',
                ]
            )
            ->build();
    }

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

    public function setDescription(?string $description): self
    {
        $this->isChanged('description', $description);
        $this->description = $description;

        return $this;
    }

    public function getDescription(): ?string
    {
        return $this->description;
    }

    public function setName(?string $name): self
    {
        $this->isChanged('name', $name);
        $this->name = $name;

        return $this;
    }

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