CurrentState<T> current = state;
            current.assertCanTransition(fromStates, toState, true);
            return doTransitionWithFailures(toState, action, current);
        });
    }

    private ExecutionResult<Void> doTransitionWithFailures(T toState, Function<ExecutionResult<Void>, ExecutionResult<Void>> action, CurrentState<T> current) {
        ExecutionResult<Void> currentResult = current.asResult();