docs: @Override
      public CoOccurrenceWeight<T> nextObject() {
          String line = iterator.nextSentence();
          if (line == null || line.isEmpty()) {
              return null;
          }
          String[] strings = line.split(" ");
  
          CoOccurrenceWeight<T> object = new CoOccurrenceWeight<>();
          object.setElement1(vocabCache.elementAtIndex(Integer.valueOf(strings[0])));
          object.setElement2(vocabCache.elementAtIndex(Integer.valueOf(strings[1])));
          object.setWeight(Double.parseDouble(strings[2]));
  
          return object;
      }