private void setTextAbbreviationExpansionMap(
     String[] tokens, int abbreviationLength, String abbreviation, int expansionIndex) {
   String expansion = getTentativeExpansion(tokens, expansionIndex, abbreviationLength);
   expansion =
       Ling.correctSpelling(getExpansionByHearstAlgorithm(abbreviation, expansion).toLowerCase())
           .trim();
   if (!expansion.equals("")) textAbbreviationExpansionMap.put(abbreviation, expansion);
 }