EXTENSION
EXTENSION
WorkflowObserver
¶sessionDidBegin(_:)
¶sessionDidEnd(_:)
¶workflowDidMakeInitialState(_:initialState:session:)
¶workflowWillRender(_:state:session:)
¶workflowDidChange(from:to:state:session:)
¶workflowDidReceiveAction(_:workflow:session:)
¶workflowWillApplyAction(_:workflow:state:session:)
¶