Function git_odb::data::output::count::objects_unthreaded

pub fn objects_unthreaded<Find, IterErr, Oid>(
    db: Find, 
    (&mut impl DecodeEntry, &mut impl Object), 
    object_ids: impl Iterator<Item = Result<Oid, IterErr>>, 
    progress: impl Progress, 
    should_interrupt: &AtomicBool, 
    input_object_expansion: ObjectExpansion
) -> Result<(Vec<Count, Global>, Outcome), Error<Error<<Find as 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.