Benders cuts in OPL using CPLEX 12.7.1


i am trying to solve a MIP problem through benders decomposition using OPL in CPLEX 12.7.1. i have gone through the examples provided with the package i.e benders and also portfolio. in this version annotations are used for benders partitions but i am confused how to use benders feasibility cut in the subproblem. in the benders example only annotations are used and no information about benders cuts and how to implement them with annotations. in portfolio optimization no annotations are used. help in this regard will be highly appreciated. a small example using benders cuts  or more information about it will be highly appreciated. 

thanks in advance

Source: Benders cuts in OPL using CPLEX 12.7.1