/// <summary>
/// Gets a list of <see cref="IShipRateTier"/> objects given a <see cref="IShipMethod"/> key
/// </summary>
/// <param name="shipMethodKey">Guid</param>
/// <returns>A collection of <see cref="IShipRateTier"/></returns>
public IEnumerable <IShipRateTier> GetShipRateTiersByShipMethodKey(Guid shipMethodKey)
{
return(_shipRateTierService.GetShipRateTiersByShipMethodKey(shipMethodKey));
}
