Function subarray
pub fn subarray<let SrcLen: u32, let DstLen: u32>(
src: [Field; SrcLen],
offset: u32,
) -> [Field; DstLen]
pub fn subarray<let SrcLen: u32, let DstLen: u32>(
src: [Field; SrcLen],
offset: u32,
) -> [Field; DstLen]