Function build_source_pack_with_references 

pub fn build_source_pack_with_references<W>(
    builder: StreamingPackBuilder<W>,
    source: &impl ObjectSource,
    selected: &State,
    references: &[ReferenceProof],
    max_objects: usize,
    max_decoded_bytes: u64,
) -> Result<(W, PackStats), HeddleError>
where
    W: Write + Read + Seek + SyncData,