MachineTrigger
What moved the machine (1.58.0; the state.trigger of the Call context): model, a proposal of the speaking model; event, a deterministic event; policy, an event a Policy raised; observer, an observer's proposal or takeover; limit, a limit's exit. Null at the machine's start and end.
An enumeration of 5 values.
Values
modeleventpolicyobserverlimit