composition.go

package main

import "fmt"

type Vehicle struct{}

func (v Vehicle) Move() {
	fmt.Println("vehicle moving")
}

type Boat struct {
	// embed the "superclass" as an unnamed struct member
	Vehicle
}

func (b Boat) Move() {
	b.Vehicle.Move()
	fmt.Println("boat moving")
}

func main() {
	new(Boat).Move()
}