code: @Override
      public Collection<String> wordsNearestSum(Collection<String> positive, Collection<String> negative, int top) {
          throw new UnsupportedOperationException("Method isn't implemented. Please use usual Word2Vec implementation");
      }
docs: Words nearest based on positive and negative words
  PLEASE NOTE: This method is not available in this implementation.
  
  @param positive the positive words
  @param negative the negative words
  @param top      the top n words
  @return the words nearest the mean of the words