LayoutBuilder

class \Drupal\layout_builder\Element\LayoutBuilder implements \Drupal\Core\Plugin\ContainerFactoryPluginInterface uses \Drupal\Core\Ajax\AjaxHelperTrait, \Drupal\layout_builder\Context\LayoutBuilderContextTrait, \Drupal\layout_builder\LayoutBuilderHighlightTrait extends \Drupal\Core\Render\Element\RenderElementBase

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