the current VecView impl does sorta that

```rust
pub struct VecInner<B: ?Sized + VecBuffer> {
    len: usize,
    buffer: B,
}
pub type Vec<T, const N: usize> = VecInner<[MaybeUninit<T>; N]>;
pub type VecView<T> = VecInner<[MaybeUninit<T>]>;