mirrorsinswift6.swift

let children = ownerMirror.children
for child in children {
    if child.label == "dog" {
        let grandChildren = Mirror(reflecting: child.value).children
        Mirror(reflecting: child.value).children
        for grand in grandChildren {
            if grand.label == "breedName" {
                print("Pete owns a \(grand.value)")
            }
        }
    }
}

//prints
//Pete owns a Husky