給定以下 Go 代碼：package maintype CatToy interface {    Rattle() string}type Cat struct {}func (cat *Cat) Play(catToy CatToy) {    println("The cat is playing!", catToy.Rattle())}type DogToy interface {    Roll() string}type Dog struct {}func (dog *Dog) Play(dogToy DogToy) {    println("The dog is playing!", dogToy.Roll())}type SuperToy struct {}func (toy *SuperToy) Rattle() string {    return "Rattle!!!"}func (toy *SuperToy) Roll() string {    return "Rolling..."}type Pet interface {    Play(toy interface{})}func main() {    cat := &Cat{}    dog := &Dog{}    superToy := &SuperToy{}    // Working    cat.Play(superToy)    dog.Play(superToy)    // Not Working    pets := []Pet{cat, dog}    for _, pet := range pets {        pet.Play(superToy)    }}我收到這些錯誤：# command-line-arguments./main.go:65:16: cannot use cat (type *Cat) as type Pet in array or slice literal:    *Cat does not implement Pet (wrong type for Play method)        have Play(CatToy)        want Play(interface {})./main.go:65:21: cannot use dog (type *Dog) as type Pet in array or slice literal:    *Dog does not implement Pet (wrong type for Play method)        have Play(DogToy)        want Play(interface {})實現(xiàn)SuperToy了CatToy和DogToy。但是，當我創(chuàng)建一個接口Pet作為參數(shù)的接口時，我得到一個錯誤。我可以知道我怎樣才能得到一個里面有貓和狗的數(shù)組/切片嗎？我想遍歷這個切片并為每個切片調(diào)用一個函數(shù)。我還想保留CatToy和DogToy接口。我也可以刪除Pet界面。更多信息：未來我更有可能添加更多pets。我認為我不會添加更多操作，例如Play.