presto-geospatial/src/main/java/io/prestosql/plugin/geospatial/GeoFunctions.java/GeoFunctions/stSymmetricDifference
class GeoFunctions:    @Description("Returns the Geometry value that represents the point set symmetric difference of two Geometries")
    @ScalarFunction("ST_SymDifference")
    @SqlType(GEOMETRY_TYPE_NAME)
    public static Slice stSymmetricDifference(@SqlType(GEOMETRY_TYPE_NAME) Slice left, @SqlType(GEOMETRY_TYPE_NAME) Slice right)
    {
        OGCGeometry leftGeometry = deserialize(left);
        OGCGeometry rightGeometry = deserialize(right);
        verifySameSpatialReference(leftGeometry, rightGeometry);
        return serialize(leftGeometry.symDifference(rightGeometry));
    }