Fulfill Purchase
To implement the fulfill purchase API using the SDK, implement one abstract method from the PurchaseServlet class: fulfillPurchase.
/**
* Process the fulfill purchase request and return the response to whether or not the
* request succeeded.
*
* @param request
* the request relative to the fulfill purchase
*
* @return a FulfillPurchaseResponse object
*/
public abstract FulfillPurchaseResponse fulfillPurchase(FulfillPurchaseRequest
request);