How to write a custom AnimNode to sending Random pose to metahuman's PoseAsset

Development Programming & Scripting C++
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The metahuman are driven by arkit blendshapes.

Now, I want using random blendhsapes to driven Metahuman face.

I Don’t know how to Write a custom AnimPose to streaming data to.

I current got this:

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I written a Custom Face Anim Node, but the node output is

virtual void EvaluateSkeletalControl_AnyThread(FComponentSpacePoseContext& Output,
	                                               TArray<FBoneTransform>& OutBoneTransforms) override

It’s OutBoneTransforms.

From my understanding, it should not be transforms, but floats (Face 53 Arkit Weight values).

How can I construct such a Pose and send to mh_arkit_mapping_pose node?

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I solved it, But I am not gonna post any information about how to solve it.