trait PluginManagerDependentValidatorTrait

trait PluginManagerDependentValidatorTrait {
    
    /**
     * The CKEditor 5 plugin manager.
     *
     * @var \Drupal\ckeditor5\Plugin\CKEditor5PluginManagerInterface
     */
    protected $pluginManager;
    
    /**
     * Constructs a CKEditor5ConstraintValidatorTrait object.
     *
     * @param \Drupal\ckeditor5\Plugin\CKEditor5PluginManagerInterface $plugin_manager
     *   The CKEditor 5 plugin manager.
     */
    public function __construct(CKEditor5PluginManagerInterface $plugin_manager) {
        $this->pluginManager = $plugin_manager;
    }
    
    /**
     * {@inheritdoc}
     */
    public static function create(ContainerInterface $container) {
        return new static($container->get('plugin.manager.ckeditor5.plugin'));
    }
    
    /**
     * Gets all other enabled CKEditor 5 plugin definitions.
     *
     * @param \Drupal\editor\EditorInterface $text_editor
     *   A Text Editor config entity configured to use CKEditor 5.
     * @param string $except
     *   A CKEditor 5 plugin ID to exclude: all enabled plugins other than this
     *   one are returned.
     *
     * @return \Drupal\ckeditor5\Plugin\CKEditor5PluginDefinition[]
     *   A list of CKEditor 5 plugin definitions keyed by plugin ID.
     */
    private function getOtherEnabledPlugins(EditorInterface $text_editor, string $except) : array {
        $enabled_plugins = $this->pluginManager
            ->getEnabledDefinitions($text_editor);
        unset($enabled_plugins[$except]);
        return $enabled_plugins;
    }
    
    /**
     * Gets all disabled CKEditor 5 plugin definitions the user can enable.
     *
     * @param \Drupal\editor\EditorInterface $text_editor
     *   A Text Editor config entity configured to use CKEditor 5.
     *
     * @return \Drupal\ckeditor5\Plugin\CKEditor5PluginDefinition[]
     *   A list of CKEditor 5 plugin definitions keyed by plugin ID.
     */
    private function getEnableableDisabledPlugins(EditorInterface $text_editor) {
        $disabled_plugins = array_diff_key($this->pluginManager
            ->getDefinitions(), $this->pluginManager
            ->getEnabledDefinitions($text_editor));
        // Only consider plugins that can be explicitly enabled by the user: plugins
        // that have a toolbar item and do not have conditions. Those are the only
        // plugins that are truly available for the site builder to enable without
        // other consequences.
        // In the future, we may choose to expand this, but it will require complex
        // infrastructure to generate messages that explain which of the conditions
        // are already fulfilled and which are not.
        $enableable_disabled_plugins = array_filter($disabled_plugins, function (CKEditor5PluginDefinition $definition) {
            return $definition->hasToolbarItems() && !$definition->hasConditions();
        });
        return $enableable_disabled_plugins;
    }

}