static <T0, T1> TupleGetter1<MutableTuple2<T0, T1>, T1> getterOrNull1() {
        return MutableTuple2::getOrNull1;
    }
Returns a {@link TupleGetter getter} for the 1st element in the {@code
Tuple}.

@return     the element at the 1st position
@param <T0> the 0th element type
@param <T1> the 1st element type
common-parent/tuple/src/main/java/com/speedment/common/tuple/mutable/MutableTuple2.java