private static DisplayMode getDisplayModeOrDefault(final FetchDataRequest fetchDataRequest) {
        return NullSafe.getOrElse(fetchDataRequest, FetchDataRequest::getDisplayMode, DEFAULT_DISPLAY_MODE);
    }
How big our buffers are. This should always be a multiple of 8.
stroom-data/stroom-data-store-impl/src/main/java/stroom/data/store/impl/DataFetcher.java