The concrete value stored in an interface is not addressable

go_interface.go

package main

import (
	"fmt"
)

type Orange struct {
}

/* this will not work, as the NewOrange return concrete as interface, which is not addressable
https://github.com/golang/go/wiki/MethodSets#interfaces

func (o *Orange) Name() string {
	return "Orange"
}
*/

func (o Orange) Name() string {
	return "Orange"
}

type Fruit interface {
	Name() string
}

func NewOrange() Fruit {
	return Orange{}
}

func main() {
	orange := NewOrange()
	fmt.Println(orange.Name())
}