code: public void add(T item) {
          hasElements = true;
          navigator = emptyItemIndex;
          items[emptyItemIndex] = item;
          if (emptyItemIndex == size - 1) {
              wasFullAtleastOnce = true;
          }
          emptyItemIndex = (emptyItemIndex + 1) % size;
      }
docs: Navigator should point to most recent added element.
  @param item