pub fn split_array_mut<const N: usize, const L: usize, const R: usize>( xs: &mut [u8; N], ) -> (&mut [u8; L], &mut [u8; R])
Splits &mut [u8; L + R] into (&mut [u8; L], &mut [u8; R]).
&mut [u8; L + R]
(&mut [u8; L], &mut [u8; R])