def METHOD_NAME():
    check_group(
        Rational(1, 3),
        Rational(1, 3),
        Rational(2, 6),
        Rational(-1, 3),
        Rational(-10, 30),
        Rational(10, 5),
    )
    # RationalOneHalf should be predefined; We reduce ratios, so
    # Rationa(1, 2) is Rational(2, 4).
    check_object_uniqueness(
        Rational, [1, 2], RationalOneHalf, Rational(1, 2), Rational(2, 4)
    )