MRClass/Assets/Scripts/Core/UI/TimelineUI/TimeLineCurve/CurveControlTrack.cs

using UnityEngine;
using UnityEngine.Playables;
using UnityEngine.Timeline;
using System.Collections.Generic;

[TrackColor(0.9454092f, 0.9779412f, 0.3883002f)]
[TrackClipType(typeof(CurveControlClip))]
[TrackBindingType(typeof(Renderer))]
public class CurveControlTrack : TrackAsset
{

    public override Playable CreateTrackMixer(PlayableGraph graph, GameObject go, int inputCount)
    {
        foreach (var clip in GetClips())
        {
            var mcb = clip.asset as CurveControlClip;
            mcb.clipPassthrough = clip;
        }
        return ScriptPlayable<CurveControlMixerBehaviour>.Create(graph, inputCount);
    }

    public override void GatherProperties(PlayableDirector director, IPropertyCollector driver)
    {

    }

}