Function next_u64_via_fill
fn next_u64_via_fill<R: RngCore + ?Sized>(rng: &mut R) -> u64Implement next_u64 via fill_bytes, little-endian order.
next_u64_via_fillfn next_u64_via_fill<R: RngCore + ?Sized>(rng: &mut R) -> u64Implement next_u64 via fill_bytes, little-endian order.