private static void SavePre(GamePersistence __instance, out ModSaveData __state)
        {
            __state = new ModSaveData();
            var saveData = (SaveData)AccessTools.Field(typeof(GamePersistence), "_saveData").GetValue(__instance);

            __state.Strip(saveData);
        }
        private static void SavePost(GamePersistence __instance, ModSaveData __state)
        {
            AccessTools.Field(typeof(GamePersistence), "_saveData").SetValue(__instance, __state.ToSaveData());
            var modSaveDataFile = File.CreateText(@"mods\ModSaveData.json");
            var jsonStr         = JsonConvert.SerializeObject(__state);

            modSaveDataFile.Write(jsonStr);
            modSaveDataFile.Flush();
            modSaveDataFile.Close();
        }