code: protected Query getTermQueryFilter(String field, String term) {
  
          return getMultiTermQueryFilter(field, term, Collections.singletonList(term));
      }
docs: Returns a cached Lucene term query filter for the given field and term.<p>
  
  @param field the field to use
  @param term the term to use
  
  @return a cached Lucene term query filter for the given field and term