code: protected void addTagging(boolean seen, IntTaggedWord itw, double count) {
      if (seen) {
        seenCounter.incrementCount(itw, count);
        if (itw.tag() == nullTag) {
          words.add(itw);
        } else if (itw.word() == nullWord) {
          tags.add(itw);
        } else {
          // rules.add(itw);
        }
      } else {
        uwModel.addTagging(seen, itw, count);
        // if (itw.tag() == nullTag) {
        // sigs.add(itw);
        // }
      }
    }
docs: Adds the tagging with count to the data structures in this Lexicon.