ScenePartition/Editor/ScenePartitionSS.cs

using UnityEditor;
using UnityEngine;

namespace VertexColor.ScenePartition.Editor
{
    [FilePath("ScenePartition/SceneDataCache.asset", FilePathAttribute.Location.ProjectFolder)]
    public class ScenePartitionSS : ScriptableSingleton<ScenePartitionSS>
    {
        public SceneDataCache SceneDataCache => sceneDataCache;

        [SerializeField]
        private SceneDataCache sceneDataCache = new SceneDataCache();

        public ScenePartitionData GetScenePartitionData(ScenePartitionSO scenePartitionSO)
        {
            if (!sceneDataCache.TryGetValue(scenePartitionSO, out ScenePartitionData scenePartitionData))
            {
                scenePartitionData = new ScenePartitionData();
                sceneDataCache.Add(scenePartitionSO, scenePartitionData);
            }

            return scenePartitionData;
        }
    }

    [System.Serializable]
    public class SceneDataCache : SerializableDictionary<ScenePartitionSO, ScenePartitionData> { }
}