virtual public void VisitAfter(CallStmt callStmt) { }
public void VisitAfter(CallStmt callStmt) { _visitor.VisitAfter(callStmt); }
virtual public void VisitBefore(CallStmt callStmt) { }
public void VisitBefore(CallStmt callStmt) { _visitor.VisitBefore(callStmt); }