Marshalling/branching patch

[wlandau]

Prework

• I understand and agree to the code of conduct and the contributing guidelines.
• I have already submitted a discussion topic or issue to discuss my idea with the maintainer.

Related GitHub issues and pull requests

• Ref: Patterns do not marshal properly #1266

Summary

• Ensure aggregated patterns marshal properly.
• Only marshal dependencies if actually sending the target to a parallel worker.