append
fun <T : Any> append(items: T): ERROR CLASS: Symbol not found for js.promise.Promise<ERROR CLASS: Symbol not found for js.core.Void>(source)
fun <T : Any> append(items: ERROR CLASS: Symbol not found for js.array.ReadonlyArray<T>): ERROR CLASS: Symbol not found for js.promise.Promise<ERROR CLASS: Symbol not found for js.core.Void>(source)
Add a menu item to the end of this submenu.
Platform-specific:
macOS: Only {@linkcode Submenu}s can be added to a {@linkcode Menu}.