Update ARView to keep only one plane detected on the scene

Hello everybody,

I am relatively new to ARKit and SceneKit and I have been experimenting with it.

I have been exploring plane detection and I want to keep only one plane in the view. If other planes are found I want the old ones to be removed.

This is the solution I found: I have an array with all found anchors and before adding a new child node I remove all the anchors from my scene.

What do you think of this solution? Do you think I should do it in any other way? Thank you!

Code Block 
private var planes = [UUID: Plane]()
private var anchors = [UUID: ARAnchor]()
func renderer(_ renderer: SCNSceneRenderer, didAdd node: SCNNode, for anchor: ARAnchor) {
        // we only care about planes
        guard let planeAnchor = anchor as? ARPlaneAnchor else {
            return
        }
        
        print("Found plane: \(planeAnchor)")
        
        for anchor in anchors {
            sceneView?.session.remove(anchor: anchor.value)
        }
        
        let plane = Plane(anchor: planeAnchor)
        planes[anchor.identifier] = plane
        anchors[anchor.identifier] = anchor
        
        node.addChildNode(plane)
    }