Iterate fields of different structures in one array - go

Question

I want to iterate fields of different structures in one array
i try to do it like this
package main
import "fmt"
func main() {
m := msh{"hshHeader"}
p := pid{"pidHeader"}
var i []EmptyInterface
i = append(i, m)
i = append(i, p)
for _, emptyInterface := range i {
fmt.Println(emptyInterface.header)
}
}
type msh struct {
header string
}
type pid struct {
header string
}
type EmptyInterface interface {
}
As expected, on line 15 I get the message "Unresolved reference 'header'".
Do I understand correctly that in Go I should do this using methods
package main
import "fmt"
func main() {
m := msh{"hshHeader"}
p := pid{"pidHeader"}
var i []EmptyInterface
i = append(i, m)
i = append(i, p)
for _, NotEmptyInterface := range i {
fmt.Println(NotEmptyInterface.PrintHeader())
}
}
type msh struct {
header string
}
func (m msh) PrintHeader() string {
return m.header
}
type pid struct {
header string
}
func (p pid) PrintHeader() string {
return p.header
}
type EmptyInterface interface {
PrintHeader() string
}
I don’t know what else to add so that the bot on the site does not throw an error "It looks like your post is mostly code; please add some more details.", I can suggest reading again.