class WorkflowType

class WorkflowType extends Plugin {
    
    /**
     * States required to exist.
     *
     * Normally supplied by WorkflowType::defaultConfiguration().
     */
    public array $required_states = [];
    
    /**
     * A list of optional form classes implementing PluginFormInterface.
     *
     * Forms which will be used for the workflow UI are:
     * - 'configure' (\Drupal\workflows\WorkflowTypeInterface::PLUGIN_FORM_KEY)
     * - 'state' (\Drupal\workflows\StateInterface::PLUGIN_FORM_KEY)
     * - 'transition' (\Drupal\workflows\TransitionInterface::PLUGIN_FORM_KEY)
     *
     * @see \Drupal\Core\Plugin\PluginWithFormsInterface
     * @see \Drupal\Core\Plugin\PluginFormInterface
     * @see \Drupal\workflows\Plugin\WorkflowTypeConfigureFormBase
     * @see \Drupal\workflows\Plugin\WorkflowTypeStateFormBase
     * @see \Drupal\workflows\Plugin\WorkflowTypeTransitionFormBase
     * @see \Drupal\workflows\WorkflowTypeInterface::PLUGIN_FORM_KEY
     * @see \Drupal\workflows\StateInterface::PLUGIN_FORM_KEY
     * @see \Drupal\workflows\TransitionInterface::PLUGIN_FORM_KEY
     */
    public array $forms = [];
    
    /**
     * Constructs an Action attribute.
     *
     * @param string $id
     *   The plugin ID.
     * @param \Drupal\Core\StringTranslation\TranslatableMarkup|null $label
     *   The label of the action.
     * @param string[] $forms
     *   A list of optional form classes implementing PluginFormInterface.
     * @param string[] $required_states
     *   States required to exist.
     */
    public function __construct(string $id, ?TranslatableMarkup $label = NULL, array $forms = [], array $required_states = []) {
        $this->forms = $forms;
        $this->required_states = $required_states;
    }

}