I want to query all of the objects in the window object, looking for any window.object that has objects nested inside of it. If one of the key values of a nested object matches a given string, I want to return the key value of the window object that contained it.

window.mysteryObj = {
    obj1:{
        abc: 1,
        def: 2,
    },
    obj2:{
        ghi: 3,
        jkl: 4,
    }
}

const keyValue = "ghi"

function findMysteryObj (key, object){
    //some logic here
    return objectName
}

findMysteryObj(keyValue, window); // should return "mysteryObj"

Can someone offer some guidance on how this can be done?