@Override
    public Position offsetToPosition(int offset, Bias bias) {
        return position(0, 0).offsetBy(offset, bias);
    }
@Test
    public void testPositiveOffsetWithBackwardBias() {
        Position pos = navigator.offsetToPosition(10, Backward);
        assertEquals(0, pos.getMajor());
        assertEquals(10, pos.getMinor());
    }