text: function AddressBook() {
    this.contacts = [];
    this.initialComplete = false;
  }
  
  AddressBook.prototype.getInitialContacts = function(cb) {
    var self = this;
  
    setTimeout(function() {
      self.initialComplete = true;
      if (cb) {
        return cb();
      }
    }, 3);
  };
  
  AddressBook.prototype.addContact = function(contact) {
    this.contacts.push(contact);
  };
  
  AddressBook.prototype.getContact = function(index) {
    return this.contacts[index];
  };
  
  AddressBook.prototype.deleteContact = function(index) {
    return this.splice(index, 1)
  };
  