page =>
array:8 [ "class" => "Drupal\Core\Render\Element\Page" "provider" => "core" "id" => "page" "#theme" => "page" "#title" => "" "#type" => "page" "#theme_wrappers" => array:1 [ "off_canvas_page_wrapper" => array:1 [ "#weight" => -1000 ] ] "#defaults_loaded" => true ]