@Override
    public List<RegionState> getRegionStatesInTransition() {
      return Collections.unmodifiableList(regionsInTransition);
    }
Convert an enum set of ClusterMetrics.Option to a list of ClusterStatusProtos.Option
@param options the ClusterMetrics options
@return a list of ClusterStatusProtos.Option
hbase-client/src/main/java/org/apache/hadoop/hbase/ClusterMetricsBuilder.java