Is this state transition allowed by the caller's workflow definition, and what is allowed instead?

Overview

Given a caller-supplied state machine (transitions with optional event names and required facts), the current state and a requested event or target state, says whether the transition is allowed, which required facts are false or unknown, and which transitions are available from the current state. For an agent about to move an order, ticket, deployment or approval to its next state. Terminal states allow nothing. Ambiguous requests (one event leading to several states) are rep

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