RequiredStateTestType.php

<?php

namespace Drupal\workflow_type_test\Plugin\WorkflowType;

use Drupal\Core\StringTranslation\StringTranslationTrait;
use Drupal\workflows\Plugin\WorkflowTypeBase;

/**
 * Test workflow type.
 *
 * @WorkflowType(
 *   id = "workflow_type_required_state_test",
 *   label = @Translation("Required State Type Test"),
 *   required_states = {
 *     "fresh",
 *     "rotten",
 *   }
 * )
 */
class RequiredStateTestType extends WorkflowTypeBase {
    use StringTranslationTrait;
    
    /**
     * {@inheritdoc}
     */
    public function defaultConfiguration() {
        return [
            'states' => [
                'fresh' => [
                    'label' => 'Fresh',
                    'weight' => 0,
                ],
                'rotten' => [
                    'label' => 'Rotten',
                    'weight' => 1,
                ],
            ],
            'transitions' => [
                'rot' => [
                    'label' => 'Rot',
                    'to' => 'rotten',
                    'weight' => 0,
                    'from' => [
                        'fresh',
                    ],
                ],
            ],
        ];
    }

}