Developing Interpolation Animation Using Plugins

Hello, I am developing an interpolation animation using a Kanzi plugin on Kanzi3.9.8. In Node2D, I created a PropertyTargetInterpolator object and used it to set acceleration, drag, and control properties. However, when I tried to obtain the node after the animation completion, I found that I couldn't directly use addMessageHandler to set a callback for CompletedMessage, nor could I call the protected function onInterpolationCompleted(TimelinePlayback &playback).

I am seeking help on how to execute a callback function when the animation is completed.