An object containing the different Tween callback functions.
You can either set these in the Tween config, or by calling the Tween.setCallback
method.
onComplete
When the Timeline finishes playback fully or Timeline.stop
is called. Never invoked if timeline is set to repeat infinitely.
onLoop
When a Timeline loops.
onStart
When the Timeline starts playing.
onUpdate
When a Timeline updates a child Tween.
onYoyo
When a Timeline starts a yoyo.