PathAliasForm.php

<?php

namespace Drupal\path;

use Drupal\Core\Entity\ContentEntityForm;
use Drupal\Core\Form\FormStateInterface;

/**
 * Form handler for the path alias edit forms.
 *
 * @internal
 */
class PathAliasForm extends ContentEntityForm {
    
    /**
     * The path_alias entity.
     *
     * @var \Drupal\path_alias\PathAliasInterface
     */
    protected $entity;
    
    /**
     * {@inheritdoc}
     */
    public function save(array $form, FormStateInterface $form_state) {
        parent::save($form, $form_state);
        $this->messenger()
            ->addStatus($this->t('The alias has been saved.'));
        $form_state->setRedirect('entity.path_alias.collection');
    }

}