fall back to unhandled() in onReceive() in docs

akka-docs/java/code/akka/docs/transactor/CoordinatedCounter.java

@@ -34,6 +34,8 @@ public class CoordinatedCounter extends UntypedActor {
             }
         } else if ("GetCount".equals(incoming)) {
             getSender().tell(count.single().get());
+        } else {
+          unhandled(incoming);
         }
     }
 }

akka-docs/java/code/akka/docs/transactor/Coordinator.java

@@ -22,6 +22,8 @@ public class Coordinator extends UntypedActor {
                 });
                 //#coordinated-atomic
             }
+        } else {
+          unhandled(incoming);
         }
     }
 }