code: void start(long currentTime) {
          this.readyTime = currentTime;
          this.startTime = this.readyTime + this.delayTime;
          this.endTime = this.startTime + getDuration();
          this.status = TweenAnimationStatus.RUNNING;
      }
docs: Starts and Restart the interpolation. Using this method can lead to some
  side-effects if you call it multiple times.