invoice: Correctly implement the return value for Invoice#addTrackingIds
@@ -168,8 +168,7 @@ public class DefaultInvoice extends EntityBase implements Invoice, Cloneable {
@Override
public boolean addTrackingIds(final Collection<String> trackingIds) {
- this.trackingIds.addAll(trackingIds);
- return true;
+ return this.trackingIds.addAll(trackingIds);
}
@Override
