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