UnityEngine.Timeline API is deprecated?

Unity Engine
,
1

My Current Unity version 2019.2.
I want to access Timeline propertys, add/remove custom tracks and add/remove custom PlayableAssets.

I can find UnityEngine.Timeline API in version 2018.3
Link : Unity - Scripting API: TrackAsset

But, I can not find the API in version 2019.2
Link : Unity - Scripting API:

I think Timeline API is removed from Unity Support API.

Is there any alternative solution to access Timeline propertys at runtime?

2

What’s going on with Unity? There’s no scripting API document for the current version of Timeline? How do they expect people to write script if there is no maintained document?

3

https://docs.unity3d.com/Packages/com.unity.timeline@1.4/manual/index.html