REST api nested datasets

I could probably just check it myself, but asking anyway: can the current REST-api of phpr return nested json, e.g. master detail structures like:

{
    "id": "master record 1",
    (...)
    },
    "detail_table": [
        {
            "id": "detail record 1",
            (...)
        },
        {
            "id": "detail record 2",
            (...)
        },
    "id": "master record 2",
    (...)
    },
    "detail_table": [
        {
            "id": "detail record 1",
            (...)
        },
    "id": "master record 3",
    "detail_table": []
    "id": "master record 4",
    (...)
    },
    "detail_table": [
        {
            "id": "detail record 1",
            (...)
        },
        {
            "id": "detail record 2",
            (...)
        }