// yet visit a variety of "values-relative-to-the-next-power-of-2"
  @Param({"5", "30", "180", "1100", "6900", "43000", "260000"}) // "1600000", "9800000"
  private int size;

  // TODO(kevinb): look at exact (==) hits vs. equals() hits?
  @Param({"0.2", "0.8"})
  private double hitRate;

  @Param("true")
  private boolean isUserTypeFast;

  // "" means no fixed seed
  @Param("")
  private SpecialRandom random;

  // yet visit a variety of "values-relative-to-the-next-power-of-2"
  @Param({"5", "30", "180", "1100", "6900", "43000", "260000"}) // "1600000", "9800000"
  private int size;

  // TODO(kevinb): look at exact (==) hits vs. equals() hits?
  @Param({"0.2", "0.8"})
  private double hitRate;

  @Param("true")
  private boolean isUserTypeFast;

  // "" means no fixed seed
  @Param("")
  private SpecialRandom random;

                final SearchHit[] hits = searchHits.getHits();
                if (hits.length == 0) {
                    break;
                }

                final BulkRequestBuilder bulkRequest = client.prepareBulk();
                for (final SearchHit hit : hits) {
                    bulkRequest.add(client.prepareDelete().setIndex(asEsIndex()).setId(hit.getId()));
                }

                final SearchHit[] hits = searchHits.getHits();
                if (hits.length == 0) {
                    break;
                }

                final BulkRequestBuilder bulkRequest = client.prepareBulk();
                for (final SearchHit hit : hits) {
                    bulkRequest.add(client.prepareDelete().setIndex(index).setId(hit.getId()));
                    count++;
                }

                final SearchHit[] hits = searchHits.getHits();
                if (hits.length == 0) {
                    break;
                }

                final BulkRequestBuilder bulkRequest = client.prepareBulk();
                for (final SearchHit hit : hits) {
                    bulkRequest.add(client.prepareDelete().setIndex(asEsIndex()).setId(hit.getId()));
                }

        JsonPath jsonPath = JsonPath.from(response.asString());
        String scrollId = jsonPath.getString("_scroll_id");
        while (true) {
            List<String> resultIds = jsonPath.getList("hits.hits._id");
            if (resultIds.size() == 0) {
                break;
            }
            docIds.addAll(resultIds);
            Map<String, Object> scrollBody = new HashMap<>();

      }
    };

    abstract Map<Element, Element> create(Collection<Element> contents);
  }

  @Param({"5", "50", "500", "5000", "50000"})
  private int size;

  // TODO: look at exact (==) hits vs. equals() hits?
  @Param("0.9")
  private double hitRate;

  @Param("true")
  private boolean isUserTypeFast;

  // "" means no fixed seed
  @Param("")
  private SpecialRandom random;

                final SearchHit[] hits = searchHits.getHits();
                if (hits.length == 0) {
                    break;
                }

                final BulkRequestBuilder bulkRequest = client.prepareBulk();
                for (final SearchHit hit : hits) {
                    bulkRequest.add(client.prepareDelete().setIndex(asEsIndex()).setId(hit.getId()));
                }

    byte[] bytes = new byte[16];
    secureRandom.nextBytes(bytes);
    return ByteString.of(bytes);
  }

  private HttpUrl redirectUrl() {
    return mockWebServer.url("/oauth/");
  }

  /** When the browser hits the redirect URL, use the provided code to ask Slack for a session. */
  @Override public MockResponse dispatch(RecordedRequest request) {
    HttpUrl requestUrl = mockWebServer.url(request.getPath());

    List<String> hits = new ArrayList<>();
    for (int i = 0; i < hitRate * 256 / 3; ++i) {
      hits.add(allConstants[0].name());
      hits.add(allConstants[allConstants.length / 2].name());
      hits.add(allConstants[allConstants.length - 1].name());
    }

    List<String> misses = new ArrayList<>();
    for (int i = 0; i < 256 - hits.size(); ++i) {
      misses.add("INVALID");
    }