verify_all_combinations_with_labeled_inputs

You can now do this:

    def test_with_labeled_input(self) -> None:
        verify_all_combinations_with_labeled_input(
            lambda a,b: a+b+1,
            arg1=(1, 3),
            arg2=(2, 4),
        )

and it will produce:

(arg1: 1, arg2: 2) => 4
(arg1: 1, arg2: 4) => 6
(arg1: 3, arg2: 2) => 6
(arg1: 3, arg2: 4) => 8