public override void GetLocalVariables(Dictionary <SequenceVariable, SetValueType> variables,
                                        List <SequenceExpressionConstructor> constructors)
 {
     GraphElementVar.GetLocalVariables(variables);
     if (VisitedFlagExpression != null)
     {
         VisitedFlagExpression.GetLocalVariables(variables, constructors);
     }
 }
 public override void GetLocalVariables(Dictionary <SequenceVariable, SetValueType> variables,
                                        List <SequenceExpressionConstructor> constructors)
 {
     DestVar.GetLocalVariables(variables);
     KeyExpression.GetLocalVariables(variables, constructors);
 }