Function git_pack::data::output::count::objects::objects_unthreaded

pub fn objects_unthreaded<Find, IterErr, Oid>(
    db: Find, 
    pack_cache: &mut impl DecodeEntry, 
    object_ids: impl Iterator<Item = Result<Oid, IterErr>>, 
    progress: impl Progress, 
    should_interrupt: &AtomicBool, 
    input_object_expansion: ObjectExpansion
) -> Result<Error<Find::Error>, IterErr> where
    Find: Find + Send + Sync,
    Oid: Into<ObjectId> + Send,
    IterErr: Error + Send, 

Like objects() but using a single thread only to mostly save on the otherwise required overhead.