Continued:

[jbonuscard-core.git] / src / org / mxchange / jfinancials / model / receipt / BillableReceipt.java

diff --git a/src/org/mxchange/jfinancials/model/receipt/BillableReceipt.java b/src/org/mxchange/jfinancials/model/receipt/BillableReceipt.java
index 5e5ca0d540d45cd714812c2bccf3cccfdc394313..7938dcbd24f9fb19c8aa358a9f2348655ef7a150 100644 (file)
--- a/src/org/mxchange/jfinancials/model/receipt/BillableReceipt.java
+++ b/src/org/mxchange/jfinancials/model/receipt/BillableReceipt.java
@@ -29,7 +29,7 @@ import org.mxchange.jusercore.model.user.User;
  * <p>
  * @author Roland Häder<roland@mxchange.org>
  */
-public interface BillableReceipt extends Serializable {
+public interface BillableReceipt extends Comparable<BillableReceipt>, Serializable {
 
        /**
         * Getter for receipt bar-code number