docs: public GVRAnimator animate(int animIndex, float timeInSec)
      {
          if ((animIndex < 0) || (animIndex >= mAnimations.size()))
          {
              throw new IndexOutOfBoundsException("Animation index out of bounds");
          }
          GVRAnimator anim = mAnimations.get(animIndex);
          anim.animate(timeInSec);
          return anim;
      }