This function returns a resource constraint predicate whose operator(const IlcResourceConstraint& rc) returns IlcTrue if and only if rc represents a sequence virtual node. The sequence virtual node of a unary resource is an automatically created resource constraint that does not affect the availability of the resource and that is used in the sequence goals and selectors to represent the virtual initial (in case of a chronological sequence goal like IlcSequence) or final (in case of an antichronological sequence goal like IlcSequenceBackward) resource constraint in the sequence of resource constraints of the unary resource .

This functions exists with either an IloEnv or an IloSolver as argument.