GoLang JSON Marshal omitempty with non-simple types - possible to avoid pointers?

Code below is the explanation. The only way I can get omitempty to work with non-simple types is to make that type a pointer.

Is there an alternative solution to this by not using pointers?

CODE NOT WORKING:

type Foo struct {
	Bar Bar `json:"bar,omitempty"`
}
type Bar struct {
	Baz string `json:"baz"`
}
func main() {
	foo := Foo{}
	jsonBytes, _ := json.Marshal(foo)
	fmt.Printf("%s\n", jsonBytes)
}

OUTPUT: {"bar":{"baz":""}}

CODE WORKING, BUT NOT WHAT I WANT:

type Foo struct {
	Bar *Bar `json:"bar,omitempty"`
}
type Bar struct {
	Baz string `json:"baz"`
}
func main() {
	foo := Foo{}
	jsonBytes, _ := json.Marshal(foo)
	fmt.Printf("%s\n", jsonBytes)
}

OUTPUT: {}

> Is there an alternative solution to this by not using pointers?

No.