Unity c# PICO set TrackedPoseDriver property

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.XR;
using Unity.XR;
using UnityEngine.SpatialTracking;

public class test : MonoBehaviour
{
    public GameObject m_MainCamera;
    // Start is called before the first frame update
    void Start()
    {
        
    }

    // Update is called once per frame
    void Update()
    {
        if (Input.GetKey(KeyCode.K))
        {
            InitTrackerPose();
        }
    }

    public void InitTrackerPose()
    {
        m_MainCamera = GameObject.Find("Main Camera");
        m_MainCamera.GetComponent<TrackedPoseDriver>().trackingType = TrackedPoseDriver.TrackingType.RotationOnly;
    }

}