domain

type Foo struct {
	ID   int64
	Name string
}

type FooRepository interface {
	Get(ctx context.Context, id int64) (foo *Foo, err error)
	Put(ctx context.Context, foo *Foo) (err error)
}

type FooService interface {
	Create(ctx context.Context, name string) (created *Foo, err error)
	Duplicate(ctx context.Context, id int64) (duplicated *Foo, err error)
}