@Override
    public boolean equals(final Object o) {
        if (this == o) {
            return true;
        }
        if (!(o instanceof ElasticClusterDoc)) {
            return false;
        }
        if (!super.equals(o)) {
            return false;
        }
        final ElasticClusterDoc elasticCluster = (ElasticClusterDoc) o;
        return Objects.equals(description, elasticCluster.description) &&
               Objects.equals(connection, elasticCluster.connection);
    }
@return A new builder for creating a {@link DocRef} for this document's type.
stroom-core-shared/src/main/java/stroom/search/elastic/shared/ElasticClusterDoc.java