pub fn fold_opt_vec_expr_or_spreads<V>(
    _visitor: &mut V,
    n: Vec<Option<ExprOrSpread>, Global>
) -> Vec<Option<ExprOrSpread>, Global>Notable traits for Vec<u8, A>impl<A> Write for Vec<u8, A> where
    A: Allocator
where
    V: Fold + ?Sized