checkExistingLayout example

    }

    /** * Helper function to create a generic ConfigLayout entity. */
    private function createContainer(
        ContainerInterface $container,
        Template $template,
        ?Layout $parent = null
    ): Layout {
        $entity = $this->checkExistingLayout(
            $template->getLayouts(),
            $container->getName()
        );

        $entity->setTemplate($template);
        $entity->setParent($parent);
        $entity->setName($container->getName());
        $entity->setAttributes($container->getAttributes());

        return $entity;
    }