On file `KillBillClient.java` on line [3477](https://github.com/killbill/killbill-client-java/blob/master/src/main/java/org/killbill/billing/client/KillBillClient.java#L3477) the method `addSimplePan` should be `addSimplePlan`.
On file
KillBillClient.javaon line 3477 the methodaddSimplePanshould beaddSimplePlan.