maybe.js

const Just = value => ({
  bind: f => f(value)
});
const Nothing = () => ({
  bind: Nothing
});

const getUser = name => Just({
  getPicture: () => Nothing()
});
const userM = getUser();
userM
  .bind(user => user.getPicture())
  .bind(picture => picture.getUrl())
  .bind(console.log.bind(console));