Function into_sized_array 

pub fn into_sized_array<const SIZE: usize, E, T>(
    bytes: T,
    into_error: impl Fn(TryFromSliceError, usize) -> E,
) -> Result<[u8; SIZE], E>
where
    T: Deref<Target = Bytes>,

Turn any Bytes-like structure into a sized slice. Useful for crypto operation requiring operands with specific bytes sizes. For example:

```

let public_key: [u8; ed25519::PublicKey::SIZE] = into_sized_array(vkey, |error, expected| {

InvalidVKeyWitness::InvalidKeySize { error, expected }

})?;

```