tracks/java/exercises/secret-handshake/src/main/java/HandshakeCalculator.java in trackler-2.1.0.40 vs tracks/java/exercises/secret-handshake/src/main/java/HandshakeCalculator.java in trackler-2.1.0.41

@@ -1,7 +1,7 @@
 import java.util.List;
 
-final class HandshakeCalculator {
+class HandshakeCalculator {
 
     List<Signal> calculateHandshake(int number) {
         throw new UnsupportedOperationException("Delete this statement and write your own implementation.");
     }