How to set the default "Show as expanded" to true in a custom menu item I am creating a series of menus in a custom module. This site also has a custom theme. Is there a way in the theme, or in the module, to set a menus "Show as expanded" to true. This way, if I move my site, uninstall, or whatever, it comes back the way it should right out of the box.
I couldn't find it anywhere on the Drupal documentation, but adding

expanded: TRUE


in the module.links.menu.yml file works.