code: protected void registerAnimatedImageAttributes() {
          addAttributeProcessor(new AnimationDelayLmlAttribute(), "delay");
          addAttributeProcessor(new AnimationMaxDelayLmlAttribute(), "maxDelay");
          addAttributeProcessor(new BackwardsLmlAttribute(), "backwards");
          addAttributeProcessor(new BouncingLmlAttribute(), "bounce", "bouncing");
          addAttributeProcessor(new CurrentFrameLmlAttribute(), "frame", "currentFrame");
          addAttributeProcessor(new FramesLmlAttribute(), "frames");
          addAttributeProcessor(new PlayOnceLmlAttribute(), "playOnce");
      }
docs: AnimatedImage widget attributes.