How to use RealityKit create face geometry

Hello, I am preparing for WWDC2021, but I encountered a small problem. I don’t know how to use RealityKit to create a facial geometry, just like using SCNKit.
SCNKit:
Code Block
func renderer(_ renderer: SCNSceneRenderer, nodeFor anchor: ARAnchor) -> SCNNode? {
    let faceMesh = ARSCNFaceGeometry(device: sceneView.device!)
    let node = SCNNode(geometry: faceMesh)
node.geometry?.firstMaterial?.fillMode = .lines
    return node
  }

I’m looking for the solution too

How to use RealityKit create face geometry
 
 
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