private final ClusterSettings clusterSettings = new ClusterSettings(Settings.EMPTY, ClusterSettings.BUILT_IN_CLUSTER_SETTINGS);
    private final PageCacheRecycler recycler = new PageCacheRecycler(Settings.EMPTY);
    private final Index index = new Index("test", "uuid");
    private final IndicesFieldDataCache indicesFieldDataCache = new IndicesFieldDataCache(
        Settings.EMPTY,

    /**
     * Number of distinct values to add to values within buckets.
     */
    private static final long DISTINCT_VALUES_IN_BUCKETS = 10;

    private final PageCacheRecycler recycler = new PageCacheRecycler(Settings.EMPTY);
    private final BigArrays bigArrays = new BigArrays(recycler, null, "REQUEST");

    /**
     * Force loading all of the implementations just for extra paranoia's sake.