Photon(PUN 2)のインスタンス化を Resources から Prefab に変更する

using System.Collections.Generic;
using UnityEngine;
using Photon.Pun;

public class MyPhotonPool : MonoBehaviourPunCallbacks, IPunPrefabPool
{
    public List<GameObject> PrefabList;

    public void Start()
    {
        // Poolの生成イベントを書き換える
        PhotonNetwork.PrefabPool = this;
    }

    public GameObject Instantiate(string prefabId, Vector3 position, Quaternion rotation)
    {
        foreach (var s in PrefabList)
        {
            if (s.name == prefabId)
            {
                var go = Instantiate(s, position, rotation);
                go.SetActive(false);
                return go;
            }
        }

        return null;
    }

    public void Destroy(GameObject go)
    {
        GameObject.Destroy(go);
    }
}

// 文字列で指定
PhotonNetwork.Instantiate("BigAsteroid", Vector3.zero, Quaternion.identity, 0);

// Prefabの名前で指定
PhotonNetwork.Instantiate(prefab.name, Vector3.zero, Quaternion.identity, 0);