@Override
    public String toString() {
        return "ResultRequest{" +
               "componentId='" + componentId + '\'' +
               ", mappings=" + mappings +
               ", requestedRange=" + requestedRange +
               ", timeFilter=" + timeFilter +
               ", openGroups=" + openGroups +
               ", resultStyle=" + resultStyle +
               ", fetch=" + fetch +
               '}';
    }
The fetch type determines if the request actually wants data returned or if it only wants data if the data has
changed since the last request was made.

@return The fetch type.
stroom-query/stroom-query-api/src/main/java/stroom/query/api/ResultRequest.java