williamvigorr3 8d1b6cf499
CORDA-3432 update structure of checkpoint class (#5983)
* Split StateMachine State into 2 classes

The idea is this better reflects the database structure. Added a
few helper methods to copy and update state.

* Doc + Improve Checkpoint API

* Rename methods to be more clear
2020-02-18 15:31:46 +00:00
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