The ReplayHistoryData type exposes the following members.
The document this record belongs to
ReplayHistory overrides check the version number to ensure the information saved in the history record is compatible with the current implementation of ReplayHistory
Each history record has a unique id that Rhino assigns when it adds the history record to the history record table
Provides access to BOTH inputs and outputs of the replay history operation.
Use this property to then call an appropriate UpdateToX() method and make your custom history support work.