SG::PyDataBucket Node1 SG::PyDataBucket - m_pyObj - m_clid - m_bib + PyDataBucket() + ~PyDataBucket() + object() + cast() + cast() + clID() + tinfo() + relinquish() + lock() + cast() + cast() + cast() + cast() Node2 DataBucketBase + DataBucketBase() + ~DataBucketBase() + object() + tinfo() + cast() + cast() + cast() + cast() + relinquish() + lock() Node2->Node1 Node3 DataObject Node3->Node2