AssetTransferLP is a "LogPlan Logic Provider":
it provides the logic to capture
PlanElements that are AssetTransfers and send AssetAssignment tasks
to the proper remote agent.
RescindLogicProvider class provides the logic to capture
rescinded PlanElements (removed from collection)
Attempts to do a complete LogPlan rescind walk, not depending on
being re-called to do the "next" level of rescind.