How to mark up external objects (ie Unity Vector3, etc) about memorypack HOT 2 CLOSED

// Keyframe: (float time, float inTangent, float outTangent, int tangentMode, int wightedMode, float inWeight, float outWeight)
[MemoryPackable]
public readonly partial struct SerializableAnimationCurve
{
    [MemoryPackIgnore]
    public readonly AnimationCurve AnimationCurve;

    [MemoryPackInclude]
    WrapMode preWrapMode => AnimationCurve.preWrapMode;
    [MemoryPackInclude]
    WrapMode postWrapMode => AnimationCurve.postWrapMode;
    [MemoryPackInclude]
    Keyframe[] keys => AnimationCurve.keys;

    [MemoryPackConstructor]
    SerializableAnimationCurve(WrapMode preWrapMode, WrapMode postWrapMode, Keyframe[] keys)
    {
        var curve = new AnimationCurve(keys);
        curve.preWrapMode = preWrapMode;
        curve.postWrapMode = postWrapMode;
        this.AnimationCurve = curve;
    }

    public SerializableAnimationCurve(AnimationCurve animationCurve)
    {
        this.AnimationCurve = animationCurve;
    }
}

public class AnimationCurveFormatter : MemoryPackFormatter<AnimationCurve>
{
    public override void Serialize(ref MemoryPackWriter writer, ref AnimationCurve value)
    {
        writer.WritePackable(new SerializableAnimationCurve(value));
    }

    public override void Deserialize(ref MemoryPackReader reader, ref AnimationCurve value)
    {
        var wrapped = reader.ReadPackable<SerializableAnimationCurve>();
        value = wrapped.AnimationCurve;
    }
}

MemoryPackFormatterProvider.Register<AnimationCurve>(new AnimationCurveFormatter());