Populate slugs for a custom table (TYPO3 10+)

ext_localconf.php

<?php

defined('TYPO3_MODE') || die ('Access denied.');

$GLOBALS['TYPO3_CONF_VARS']['SC_OPTIONS']['ext/install']['update']['projectsSlugs'] = \Vendor\MyExtension\Updates\PopulateProjectSlugs::class;

PopulateProjectSlugs.php

<?php

declare(strict_types=1);

namespace Vendor\MyExtension\Updates;

use TYPO3\CMS\Install\Updates\PopulatePageSlugs;
use TYPO3\CMS\Install\Updates\RepeatableInterface;

class PopulateProjectSlugs extends PopulatePageSlugs implements RepeatableInterface
{
    /**
     * @var string
     */
    protected $table = 'tx_myextension_domain_model_project';

    /**
     * @var string
     */
    protected $fieldName = 'slug';

    /**
     * @return string Unique identifier of this updater
     */
    public function getIdentifier(): string
    {
        return 'projectsSlugs';
    }

    /**
     * @return string Title of this updater
     */
    public function getTitle(): string
    {
        return 'Introduce URL parts ("slugs") to all existing projects';
    }

    /**
     * @return string Longer description of this updater
     */
    public function getDescription(): string
    {
        return '';
    }

    /**
     * Load the TCA field configuration for the slug field
     * and add further static fields to generatorOptions.
     *
     * @return array
     */
    protected function getSlugFieldConfig(): array
    {
        return $GLOBALS['TCA'][$this->table]['columns'][$this->fieldName]['config'];
    }
}