This function returns a resource constraint predicate whose operator(const IlcResourceConstraint& rc) returns IlcTrue if and only if rc surely affects the availability of the resource. Otherwise, it returns IlcFalse. This member function returns IlcFalse if the resource constraint rc is an empty handle; that is, if it corresponds to a virtual resource constraint (source or sink node). This predicate is implemented using IlcResourceConstraint::possiblyContributes.

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