/** @since Available in iOS 7.0 and later. */
 public boolean isExpired() {
   if (data.containsKey(IsExpiredKey())) {
     NSNumber val = (NSNumber) data.get(IsExpiredKey());
     return val.booleanValue();
   }
   return false;
 }
 /** @since Available in iOS 7.0 and later. */
 public boolean isVolumePurchase() {
   if (data.containsKey(IsVolumePurchaseKey())) {
     NSNumber val = (NSNumber) data.get(IsVolumePurchaseKey());
     return val.booleanValue();
   }
   return false;
 }
 @Override
 public String toString() {
   if (data != null) return data.toString();
   return super.toString();
 }
 /** @since Available in iOS 7.0 and later. */
 public SKReceiptRefreshRequestOptions setVolumePurchase(boolean volumePurchase) {
   data.put(IsVolumePurchaseKey(), NSNumber.valueOf(volumePurchase));
   return this;
 }
 /** @since Available in iOS 7.0 and later. */
 public SKReceiptRefreshRequestOptions setRevoked(boolean revoked) {
   data.put(IsRevokedKey(), NSNumber.valueOf(revoked));
   return this;
 }
 /** @since Available in iOS 7.0 and later. */
 public SKReceiptRefreshRequestOptions setExpired(boolean expired) {
   data.put(IsExpiredKey(), NSNumber.valueOf(expired));
   return this;
 }