return null;
        }

        String version = getVersion(candidateModel);
        if (version != null && parent.getVersion() != null && !version.equals(parent.getVersion())) {
            try {
                VersionRange parentRange = versionParser.parseVersionRange(parent.getVersion());
                if (!parentRange.contains(versionParser.parseVersion(version))) {

            final EntityCreator<T, SearchResponse, SearchHit> creator) {
        return search(index, searchRequestBuilder -> {
            searchRequestBuilder.setVersion(true);
            return condition.build(searchRequestBuilder);
        }, (queryBuilder, execTime, searchResponse) -> searchResponse.map(response -> {
            final SearchHit[] hits = response.getHits().getHits();

                if (equals(existing.getVersion(), dependency.getVersion())) {
                    msg = "duplicate declaration of version " + Objects.toString(dependency.getVersion(), "(?)");
                } else {
                    msg = "version " + Objects.toString(existing.getVersion(), "(?)") + " vs "
                            + Objects.toString(dependency.getVersion(), "(?)");
                }