const mySafeDarthvader = safe({
  name : 'Anakin',
  mother : {
    name : 'Shmi'
  }
});

console.log(mySafeObj.name); // returns "Anakin"

console.log(mySafeObj.mother.name); // returns "Anakin"

console.log(mySafeObj.father.name); // returns a reference to Undefined (our Undefined, not Javascript's undefined)

console.log(either(mySafeObj.father.father.name, false)); // returns our fallback value, of false