use crate::{    hash, pack,    pack::{index::write::Entry, index::V2_SIGNATURE},};use byteorder::{BigEndian, WriteBytesExt};use git_object::owned;use std::io; pub(crate) fn to_write(    out: impl io::Write,    _entries_sorted_by_oid: Vec<Entry>,    kind: pack::index::Kind,) -> io::Result<owned::Id> {    use io::Write;     // Write header    let mut out = hash::Write::new(out, kind.hash());    out.write_all(V2_SIGNATURE)?;    out.write_u32::<BigEndian>(kind as u32)?;     // todo: write fanout    Ok(out.hash.digest().into())}