fn chunk_array_slice(
chunk_size: usize,
indices: impl ExactSizeIterator<Item = usize>,
writer: impl Fn(usize, &mut [u8]),
) -> Vec<FixedLenByteArray>fn chunk_array_slice(
chunk_size: usize,
indices: impl ExactSizeIterator<Item = usize>,
writer: impl Fn(usize, &mut [u8]),
) -> Vec<FixedLenByteArray>