Update product reservations API to take an ID.

Mobile Buy SDK/Mobile Buy SDK Tests/BUYIntegrationTest.m

@@ -1025,7 +1025,7 @@
 	
 	// Expire the checkout
 	XCTestExpectation *expectation2 = [self expectationWithDescription:NSStringFromSelector(_cmd)];
-	[self.client removeProductReservationsFromCheckout:_checkout completion:^(BUYCheckout *returnedCheckout, NSError *error) {
+	[self.client removeProductReservationsFromCheckoutWithToken:_checkout.token completion:^(BUYCheckout *returnedCheckout, NSError *error) {
 		
 		XCTAssertNil(error);
 		

Mobile Buy SDK/Mobile Buy SDK/Data/BUYClient+Checkout.h

@@ -220,12 +220,12 @@ typedef void (^BUYDataGiftCardBlock)(BUYGiftCard * _Nullable giftCard, NSError *
  *  `reservationTime` to `@0` and calls `updateCheckout:completion`. We recommend creating
  *  a new BUYCheckout object from a BUYCart for further API calls.
  *
- *  @param checkout The BUYCheckout to expire
+ *  @param checkoutToken The checkout token for which to expire
  *  @param block         (^BUYDataCheckoutBlock)(BUYCheckout *checkout, NSError *error);
  *
  *  @return The associated BUYRequestOperation
  */
-- (BUYRequestOperation *)removeProductReservationsFromCheckout:(BUYCheckout *)checkout completion:(BUYDataCheckoutBlock)block;
+- (BUYRequestOperation *)removeProductReservationsFromCheckoutWithToken:(NSString *)checkoutToken completion:(BUYDataCheckoutBlock)block;
 
 @end
 

Mobile Buy SDK/Mobile Buy SDK/Data/BUYClient+Checkout.m

@@ -39,6 +39,7 @@
 #import "BUYPaymentToken.h"
 #import "NSDecimalNumber+BUYAdditions.h"
 
+#define BUYAssertToken(checkoutToken) BUYAssert((checkoutToken), @"Checkout assertion failed. Checkout must have a valid token associated with it.")
 #define BUYAssertCheckout(checkout)   BUYAssert([(checkout) hasToken], @"Checkout assertion failed. Checkout must have a valid token associated with it.")
 
 @implementation BUYClient (Checkout)
@@ -270,11 +271,14 @@
 
 #pragma mark - Reservations -
 
-- (BUYRequestOperation *)removeProductReservationsFromCheckout:(BUYCheckout *)checkout completion:(BUYDataCheckoutBlock)block
+- (BUYRequestOperation *)removeProductReservationsFromCheckoutWithToken:(NSString *)checkoutToken completion:(BUYDataCheckoutBlock)block
 {
-	BUYAssertCheckout(checkout);
+	BUYAssertToken(checkoutToken);
 	
+	BUYCheckout *checkout    = [[BUYCheckout alloc] initWithModelManager:self.modelManager JSONDictionary:@{}];
 	checkout.reservationTime = @0;
+	checkout.token           = checkoutToken;
+	
 	return [self updateCheckout:checkout completion:block];
 }