Can I Use the Library to Implement a Fallback Mechanism？

I want to use this library to use json primitives to achieve an approval/reject effect,I want to make the current process node back to the previous node, or even earlier nodes. What should I do.

The issue names no files, tests, or entry points. First clarify how JSON primitives represent approval or rejection and whether returning to the previous or an earlier workflow node is required. Done would require an agreed fallback design and corresponding implementation and tests.

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