pub(crate) fn continue_app_setup(
    ctx: &mut EventCtx<'_>,
    app: &mut App,
    title: bool,
    setup: Setup,
    secondary: Option<PerMap>
) -> Vec<Box<dyn State<App>>>Notable traits for Vec<u8, A>impl<A> Write for Vec<u8, A> where
    A: Allocator