Creating tab widget with custom module

Hi,
i'm trying to create a panel container with a tab container and a button inside that tab with a custom module. Although everything is created in the client (I can see that in de project tree), the tab container is not shown. I think I'm missing something here. Anyone any idea?

Regards,
Erik

receive("/EDIT", "root", {
          widgets: [
            {
              type: "panel",
              id: "PANEL_osc",
              label: "1",
              widgets: [
                {
                  type: "tab",
                  id: "TAB_osc",
                  widgets: [
                    {
                      type: "button",
                      id: "Button_osc",
                    },
                  ],
                },
              ],
            },
          ],
        });

replace

              label: "1",
              widgets: [

with

              label: "1",
              tabs: [

and you should be good

Thanks, I've missed that one. Works fine now!