code: public void playTogether(Animator... items) {
          if (items != null) {
              mNeedsSort = true;
              Builder builder = play(items[0]);
              for (int i = 1; i < items.length; ++i) {
                  builder.with(items[i]);
              }
          }
      }
docs: Sets up this AnimatorSet to play all of the supplied animations at the same time.
  
  @param items The animations that will be started simultaneously.