How to properly toggle Face Tracking?

Hi,

I want to use Face Tracking , then on button click dis-/ enable the face tracking. When the face tracking is disabled, I want to attach a 3d model to the AR camera (rear cam) and vice versa. I am using the following code to toggle the face tracking, is it the correct way?

Code (CSharp):

1. void ToggleTracking()
2.     {
3.         if (_arFaceManager.enabled) // attach model to the rear AR camera
4.         {
5.             _arFaceManager.enabled = false;
6.             _trackedFace.GetComponent<MeshRenderer>().enabled = false;
7.             _trackedFace.GetComponent<ARFaceMeshVisualizer>().enabled = false;
8.             _trackedFace.GetComponent<ARFace>().enabled = false;
9.  
10.             _currentProduct.transform.parent = Camera.main.transform;
11.             _trackedFace.gameObject.SetActive(false);
12.         }
13.         else  // attach model to the tracked face
14.         {
15.             // first enable the ArFaceManager
16.             _arFaceManager.enabled = true;
17.             _trackedFace.gameObject.SetActive(true);
18.             _trackedFace.GetComponent<ARFace>().enabled = true;
19.             _trackedFace.GetComponent<ARFaceMeshVisualizer>().enabled = true;
20.             _trackedFace.GetComponent<MeshRenderer>().enabled = true;
21.  
22.             _currentProduct.transform.parent = _trackedFace.transform;
23.         }
24.     }
25.  

I am using ARFoundation 3.0.