func (bag *sbTreeRidBag) serializeDelegate(bw *rw.Writer) error {
if bag.collectionPtr == nil {
bw.WriteLong(-1)
bw.WriteLong(-1)
bw.WriteInt(-1)
} else {
bw.WriteLong(bag.collectionPtr.fileId)
bw.WriteLong(bag.collectionPtr.pageIndex)
bw.WriteInt(int32(bag.collectionPtr.pageOffset))
}
bw.WriteInt(-1) // TODO: cached size; need a real value for compatibility with <= 1.7.5
bw.WriteInt(0) // TODO: support changes in sbTreeRidBag
return bw.Err()
}