700. TypeScript Readonly Utility Behavior

type User = {
  id: string
  profile: {
    name: string
  }
}

const user: Readonly<User> = {
  id: '1',
  profile: { name: 'Sam' }
}

user.id = '2'
user.profile = { name: 'Lee' }
user.profile.name = 'Lee'