advantages

type Animal struct {
}

type Cache interface {
	Get(ID int) *Animal
	Put(ID int, value *Animal)
}

type CarV1 struct {
	// contains filtered or unexported fields
}

type CarV2 struct {
	// contains filtered or unexported fields
}

type Datastore interface {
	Load(ID int) (*Animal, error)
	Save(ID int, value *Animal) error
}

type DefaultRenderer struct{}

type DefaultStorage struct{}

type Engine interface {
	Start()
	Drive()
	Stop()
}

type Generator struct {
	// contains filtered or unexported fields
}

type LoaderWithJIT struct {

	// optional cache
	OptionalCache Cache
	// contains filtered or unexported fields
}

type LoaderWithoutJIT struct {

	// optional cache
	OptionalCache Cache
	// contains filtered or unexported fields
}

type MyLoader struct {
	// contains filtered or unexported fields
}

type Renderer interface {
	Render(template io.Reader, params ...interface{}) []byte
}

type Storage interface {
	Load() []interface{}
}