将JSON解组为struct-列表中列表的类型吗？

I am trying to unmarshal a JSON object into a struct in Go. Here is the JSON object:

{"configuration": {
        "current power source": "",
        "sensor catalogue": [[], [], [], []],
        "actuator catalogue": [[], [], [], []],
        "active interface": ""
    }
}

And here is the struct in Go:

type Data struct{
Configuration struct {
            CurrentPowerSource string `json: "current power source"`
            SensorCatalogue  //what is the type in Go for list within a list?
            ActuatorCatalogue //each list within the list has a different type
            ActiveInterface string `json: "active interface"`
        }
}

My question is, how do I represent the type of list within a list in Go (in sensor catalogue and actuator catalogue)? When I fill my JSON object up with values, it'll look something like this:

{"sensor catalogue": [["temperature", "humidity"], ["dht22"], [17], ["digital"]]}

What is the proper way to unmarshal this?

It depends on what types are within the inner slices.

Arbitrary types? Use [][]interface{}

type Data struct{
    Configuration struct {
        CurrentPowerSource string 
        SensorCatalogue    [][]interface{}
        ActuatorCatalogue  [][]interface{}
        ActiveInterface    string 
    }
}

String types? Use [][]string

type Data struct{
    Configuration struct {
        CurrentPowerSource string 
        SensorCatalogue    [][]string
        ActuatorCatalogue  [][]string
        ActiveInterface    string 
    }
}

Custom types? Use [][]CustomType

type Data struct{
    Configuration struct {
        CurrentPowerSource string 
        SensorCatalogue    [][]CustomType
        ActuatorCatalogue  [][]CustomType
        ActiveInterface    string 
    }
}

You get the idea...