n := 0
	wasSpace := 1
	// setBits is used to track which bits are set in the bytes of s.
	setBits := uint8(0)
	for i := 0; i < len(s); i++ {
		r := s[i]
		setBits |= r
		isSpace := int(asciiSpace[r])
		n += wasSpace & ^isSpace
		wasSpace = isSpace
	}

	if setBits >= utf8.RuneSelf {
		// Some runes in the input slice are not ASCII.

    doTestSetBits(inRange('A', 'Z').and(inRange('F', 'K').negate()));
  }

  @GwtIncompatible // java.util.BitSet
  private void doTestSetBits(CharMatcher matcher) {
    BitSet bitset = new BitSet();
    matcher.setBits(bitset);
    for (int i = Character.MIN_VALUE; i <= Character.MAX_VALUE; i++) {
      assertEquals(matcher.matches((char) i), bitset.get(i));
    }
  }

  public void testEmpty() throws Exception {

    doTestSetBits(inRange('A', 'Z').and(inRange('F', 'K').negate()));
  }

  @GwtIncompatible // java.util.BitSet
  private void doTestSetBits(CharMatcher matcher) {
    BitSet bitset = new BitSet();
    matcher.setBits(bitset);
    for (int i = Character.MIN_VALUE; i <= Character.MAX_VALUE; i++) {
      assertEquals(matcher.matches((char) i), bitset.get(i));
    }
  }

  public void testEmpty() throws Exception {

        final SearchResultBuilder builder = SearchResult.create();
        searchResponseOpt.ifPresent(searchResponse -> {
            final SearchHits searchHits = searchResponse.getHits();
            builder.allRecordCount(searchHits.getTotalHits().value());
            builder.allRecordCountRelation(searchHits.getTotalHits().relation().toString());
            builder.queryTime(searchResponse.getTook().millis());

        String scrollId = response.getScrollId();
        try {
            while (scrollId != null) {
                final SearchHits searchHits = getSearchHits(response);
                final SearchHit[] hits = searchHits.getHits();
                if (hits.length == 0) {
                    break;
                }

                if (!handler.apply(searchHits)) {
                    break;
                }

        String scrollId = response.getScrollId();
        try {
            while (scrollId != null) {
                final SearchHits searchHits = getSearchHits(response);
                final SearchHit[] hits = searchHits.getHits();
                if (hits.length == 0) {
                    break;
                }

                if (!handler.apply(searchHits)) {
                    break;
                }

        String scrollId = response.getScrollId();
        try {
            while (scrollId != null) {
                final SearchHits searchHits = getSearchHits(response);
                final SearchHit[] hits = searchHits.getHits();
                if (hits.length == 0) {
                    break;
                }

                if (!handler.apply(searchHits)) {
                    break;
                }

                .setSize(0)
                .setTrackTotalHits(true)
                .execute()
                .actionGet(fessConfig.getIndexSearchTimeout());
        final TotalHits totalHits = countResponse.getHits().getTotalHits();
        if (totalHits != null) {
            return totalHits.value();
        }
        return 0;
    }

    /**
     * Deletes all documents associated with the specified session ID.