public double vincentyDistance(LatLong other) {
        return LatLongUtils.vincentyDistance(this, other);
    }
@Test
    public void vincentyDistance_originToNearOfSriLanka_returnQuarterOfEarthEquatorCircumference() {
        // This is the origin of the WGS-84 reference system
        LatLong zeroZero = new LatLong(0d, 0d);
        // These coordinates are 1/4 Earth circumference from zero on the equator
        LatLong nearSriLanka = new LatLong(0d, 90d);

        double vincenty = LatLongUtils.vincentyDistance(zeroZero, nearSriLanka);
        assertEquals(EARTH_EQUATOR_CIRCUMFERENCE / 4, vincenty, 1E-4);
    }