block1.go

package interfaceexample

import (
	"fmt"
)

// FlyBehaviour defines an interface for fly behaviour
type FlyBehaviour interface {
	Fly()
	Type() string
}

// FlyWithWings defines the fly behavior with wings.
type FlyWithWings struct {
}

func (f *FlyWithWings) Fly() {
	fmt.Print("Fly with wings!\n")
}

func (f *FlyWithWings) Type() string {
	return "fly-with-wings"
}

// FlyWithWings defines the fly behavior with super power. 
type FlyWithSuperPower struct {
}

func (f *FlyWithSuperPower) Fly() {
	fmt.Print("Fly with super power!\n")
}

func (f *FlyWithSuperPower) Type() string {
	return "fly-with-super-power"
}