@Override
    public String toString() {
        return "StateDoc{" +
               "scyllaDbRef=" + scyllaDbRef +
               ", description='" + description + '\'' +
               ", stateType=" + stateType +
               ", condense=" + condense +
               ", condenseAge=" + condenseAge +
               ", condenseTimeUnit=" + condenseTimeUnit +
               ", retainForever=" + retainForever +
               ", retainAge=" + retainAge +
               ", retainTimeUnit=" + retainTimeUnit +
               '}';
    }
@return A new builder for creating a {@link DocRef} for this document's type.
stroom-core-shared/src/main/java/stroom/state/shared/StateDoc.java