go experiments with embedding and interfaces

foo.go

package main

import "fmt"
import "encoding/json"

type Versions struct {
  versions []int
}

func (v Versions) First() int {
  return v.versions[0]
}

type Message struct {
    Name string
    Body string
    Time int64

    Versions
}

func (m Message) Foo() {
}

type Foobable interface {
  Foo()
  First() int
}

func main() {
	m := Message{"Alice", "Hello", 1294706395881547000, Versions{[]int{111,2,3}}}
	f := Foobable(m)
	b, _ := json.Marshal(f)
	fmt.Println("Hello, playground",string(b))
	
	fmt.Println(f.First())
}