Test.java

import com.twitter.util.Function;

public class Test {
  public void test() {
        final PartialFunction<Tuple2<Object, Try<Response>>, scala.Boolean> decider =
            new Function<Tuple2<Object,Try<Response>>, Boolean>() {

                @Override
                public scala.Boolean apply(Tuple2<Object, Try<Response>> v1) {
                    if (v1._2().isReturn()) {
                        final int responseCode = v1._2().get().getStatusCode();
                        return responseCode >= 500 && responseCode < 600;
                    }
                    return false;
                }
            };
    }
}