class MyModule {

    ref MyApiClient m_ApiClient = new MyApiClient();
    ref array<ref MyApiData> m_ApiData; // Data written here don't get destrcuted


    // Can be called multiple times
    void OnModuleReady() {
        m_ApiClient.LoadData(ScriptCaller.Create(OnLoadData))
    }

    // Can be called multiple times because of ^
    void OnLoadMarkers(MyRestCallbackResult result) {
        if (result.IsSuccess()) {
            // Everything written with serializer to m_ApiData don't destructed until i manually do that like this: 
            if (m_ApiData && m_ApiData.Count() > 0)
            {
                foreach (MyApiData data : m_ApiData)
                {
                    delete data;
                }
            }
            // m_ApiData.Clear() - not helping, only delete

            string error;
            if (m_ApiClient.GetSerializer().ReadFromString(m_ApiData, result.GetData(), error)) {
                MyLogger.LogError(error);
                return;
            }
        }
    }
}

class MyApiData {

    // i can even remove ref here, and inside array - this won't get destroyed
    ref array<ref MyApiData> SubData;

    // And even SubData don't destructs, until i do that:
    void ~MyApiData() {
        if (SubData) {
            foreach (MyApiData data : SubData)
            {
                delete data;
            }
        }
    }
}

[
    {
        "id": "67d1ab88a7fcaf727c5d9e4e",
        "name": "#STR_EDGE_PERSONAL_MARKERS_ROOT",
        "canEdit": true,
        "subGroups": [
            {
                "id": "67d3090c40663f5781f21bdb",
                "name": "Good marks",
                "canEdit": true,
                "subGroups": [
                    {
                        "id": "67d3094040663f5781f21c08",
                        "name": "For partially good",
                        "canEdit": true,
                        "subGroups": []
                    },
                    {
                        "id": "67d3094a40663f5781f21c11",
                        "name": "For completely good",
                        "canEdit": true,
                        "subGroups": []
                    }
                ]
            },
            {
                "id": "67d3091240663f5781f21be3",
                "name": "For a bad guys",
                "canEdit": true,
                "markers": [],
                "subGroups": []
            },
            {
                "id": "67d3091640663f5781f21beb",
                "name": "For neutrals",
                "canEdit": true,
                "markers": [],
                "subGroups": []
            },
            {
                "id": "67d3091d40663f5781f21bf3",
                "name": "Do not open",
                "canEdit": true,
                "markers": [],
                "subGroups": []
            },
            {
                "id": "67d3092340663f5781f21bfb",
                "name": "Why is it here???",
                "canEdit": true,
                "markers": [],
                "subGroups": []
            }
        ]
    },
    {
        "id": "67d1ab88a7fcaf727c5d9e4a",
        "name": "#STR_EDGE_SERVER_MARKERS_ROOT",
        "canEdit": false,
        "markers": [],
        "subGroups": []
    }
]