code: public java.util.List<String> getClusterStates() {
          if (clusterStates == null) {
              clusterStates = new com.amazonaws.internal.SdkInternalList<String>();
          }
          return clusterStates;
      }
docs: <p>
  The cluster state filters to apply when listing clusters.
  </p>
  
  @return The cluster state filters to apply when listing clusters.
  @see ClusterState