/// <summary>
/// Adds a <see cref="IShipment"/> to the extended data collection
/// </summary>
/// <param name="extendedData"></param>
/// <param name="shipment"></param>
public static void AddShipment(this ExtendedDataCollection extendedData, IShipment shipment)
{
extendedData.AddAddress(shipment.GetOriginAddress(), Constants.ExtendedDataKeys.ShippingOriginAddress);
extendedData.AddAddress(shipment.GetDestinationAddress(), Constants.ExtendedDataKeys.ShippingDestinationAddress);
extendedData.SetValue(Constants.ExtendedDataKeys.ShipMethodKey, shipment.ShipMethodKey.ToString());
extendedData.AddLineItemCollection(shipment.Items);
}