code: @Override
      public void setCountForDoc(String word, long count) {
          T element = extendedVocabulary.get(word);
          if (element != null) {
              element.setSequencesCount(count);
          }
      }
docs: Set exact number of observed documents that contain specified word
  
  Please note: this method is NOT thread-safe
  
  @param word the word to set the count for
  @param count the count of the word