use crate::pack;use git_object::borrowed;use quick_error::quick_error; quick_error! {    #[derive(Debug)]    pub enum Error {        Decode(err: pack::data::decode::Error) {            display("Could not decode object")        }    }} impl pack::Bundle {    /// `id` is a 20 byte SHA1 of the object to locate in the pack    ///    /// Note that ref deltas are automatically resolved within this pack only, which makes this implementation unusable    /// for thin packs.    /// For the latter, pack streams are required.    pub fn locate<'a>(        &self,        id: borrowed::Id,        out: &'a mut Vec<u8>,        cache: &mut impl pack::cache::DecodeEntry,    ) -> Option<Result<pack::Object<'a>, Error>> {        let idx = self.index.lookup(id)?;        let ofs = self.index.pack_offset_at_index(idx);        let pack_entry = self.pack.entry(ofs);        self.pack            .decode_entry(                pack_entry,                out,                |id, _out| {                    self.index.lookup(id).map(|idx| {                        pack::data::decode::ResolvedBase::InPack(self.pack.entry(self.index.pack_offset_at_index(idx)))                    })                },                cache,            )            .map_err(Error::Decode)            .map(move |r| pack::Object {                kind: r.kind,                data: out.as_slice(),            })            .into()    }}