import edu.berkeley.sbp.util.*;
/** implementation of <tt>Topology</tt> for any class for which there is a mapping to the <tt>int</tt>s */
-public class IntegerTopology<V> implements Topology<V> {
+public class IntegerTopology<V> implements Topology<V>, Serializable {
private final Range.Set rs;
private final Functor<V,Integer> f;