final BulkItemResponse[] responses = bulkResponse.getItems();
        for (int i = 0; i < responses.length; i++) {
            final BulkItemResponse response = responses[i];
            if (response.isFailed()) {
                if (ignoreAlreadyExists) {
                    continue;
                }
                sb.append("\n[")
                        .append(i)
                        .append("]: index [")