43     void SetVisited(GateAccessor& acc)  in SetVisited()  argument
45         acc.SetMark(state_, MarkCode::VISITED);  in SetVisited()
48     void SetFinished(GateAccessor& acc)  in SetFinished()  argument
50         acc.SetMark(state_, MarkCode::FINISHED);  in SetFinished()
53     bool IsUnvisited(GateAccessor& acc) const  in IsUnvisited()  argument
55         return acc.GetMark(state_) == MarkCode::NO_MARK;  in IsUnvisited()
58     bool IsVisited(GateAccessor& acc) const  in IsVisited()  argument
60         return acc.GetMark(state_) == MarkCode::VISITED;  in IsVisited()
63     bool IsFinished(GateAccessor& acc) const  in IsFinished()  argument
65         return acc.GetMark(state_) == MarkCode::FINISHED;  in IsFinished()
88     bool IsSimple(GateAccessor *acc) const;