@Override
    public int hashCode() {
        return Objects.hash(componentId, mappings, requestedRange, timeFilter, openGroups, resultStyle, 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