-OrderEdge *allocOrderEdge(OrderNode *begin, OrderNode *end);
-void deleteOrderEdge(OrderEdge *This);
-void setPseudoPos(OrderGraph *graph, OrderEdge *edge);
-void setMustPos(OrderGraph *graph, OrderEdge *edge);
-void setMustNeg(OrderGraph *graph, OrderEdge *edge);
-void setPolPos(OrderGraph *graph, OrderEdge *edge);
-void setPolNeg(OrderGraph *graph, OrderEdge *edge);
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