justForTest.js

function(fn, cb){
  var a = fn(cb);
  var b;
  setTimeout(function(){
    b = fn(cb);
  }, 100);
}

function Man(name, age){
  this.name = name;
  this.age = age;
}

Man.prototype.getName = function(){
  return this.name;
}

Man.prototype.getFullData = function(){
  return {
    name: this.getName(),
    age: this.age
  }
}

justForTest2.js

function(a,b,c){
  return a(b(c));
}