*/
private Document getUniqueDocument(final IndexReader indexReader, final Term idTerm, final String searchCRID) {
try {
TermDocs docs = indexReader.termDocs(idTerm);
while (docs.next()) {
Document doc = indexReader.document(docs.doc());
String crID = doc.get(CR_FIELD_KEY);
if (crID != null && crID.equals(searchCRID)) {
return doc;
}
}