MetaCont< T > Node1 MetaCont< T > - m_mut - m_metaSet + MetaCont() + ~MetaCont() + insert() + erase() + entries() + valid() + sources() + list() + insert() + find() + get() + getAsVoid() Node2 MetaContBase + MetaContBase() + ~MetaContBase() + insert() + erase() + entries() + valid() + sources() + list() + getAsVoid() Node2->Node1