mobile.ts

type Mobile {
  confirmed: boolean,
  value: string
}

type User {
  /* name, surname, etc */
  mobile: Mobile
}

// an user with confirmed mobile
const User1 = {
  name: 'Mario',
  mobile: {
    confirmed: true,
    value: '123456789'
  }
}

// an user with UNconfirmed mobile
const User2 = {
  name: 'Luigi',
  mobile: {
    confirmed: false,
    value: '987654321'
  }
}