book Transitions where action "book" appears CREATED->STARTED book description check_availability Transitions where action "check_availability" appears CREATED->STARTED check_availability description send_email Transitions where action "send_email" appears STARTED->FINISHED send_email description fail_order Transitions where action "fail_order" appears fail_order description call_api_v2 Transitions where action "call_api_v2" appears CREATED->FAILED call_api_v2 description