void (PairT pairT) { switch (<error descr="'switch' statement does not cover all possible input values">pairT</error>) { //error case PairT(T11 t1, T1 t2) -> System.out.println(1); case PairT(T12 t1, T1 t2) -> System.out.println(1); case PairT(T2 t1, T t2) -> System.out.println(1); } }