public function getFlatShippingRates(Country_Shipping $country)
{
//Get valid rates for this country
$countryID = $country && $country->exists() ? $country->ID : null;
$rates = FlatFeeShippingRate::get()->filter("CountryID", $countryID);
$this->extend("updateFlatShippingRates", $rates, $country);
return $rates;
}
