@JsonPropertyDescription(DESCRIPTION_PREFIX + "the number of items on the stream task queue.")
    @JsonProperty("streamTaskQueueSize")
    public List<DocRef> getStreamTaskQueueSizeDocRefs() {
        return streamTaskQueueSizeDocRefs;
    }
//     * Get the list of DocRefs that correspond to a particular key
//
stroom-statistics/stroom-statistics-impl/src/main/java/stroom/statistics/impl/InternalStatisticsConfig.java