Name Type Location Description
Layout::$is_full_page property core/modules/layout/includes/layout.class.inc Whether this layout is a full page layout (for example, with a header and footer, optional page title) or not.
LayoutFlexibleTemplate::$is_full_page property core/modules/layout/includes/layout_flexible.class.inc Whether this layout is a full page layout (for example, with a header and footer, optional page title) or not.