## Description 

To be used in smart ancestor selection
[PR#19605](https://github.com/MystenLabs/sui/pull/19605)

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## Release notes

Check each box that your changes affect. If none of the boxes relate to
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- [ ] Protocol: 
- [ ] Nodes (Validators and Full nodes): 
- [ ] Indexer: 
- [ ] JSON-RPC: 
- [ ] GraphQL: 
- [ ] CLI: 
- [ ] Rust SDK:
- [ ] REST API: