text: ﻿var firstNameSymbol = Symbol();
  var lastNameSymbol = Symbol();
  
  export class Person {
      constructor(firstName, lastName) {
          this[firstNameSymbol] = firstName;
          this[lastNameSymbol] = lastName;
      }
  
      greet(name) {
          return "Hello, " + name + ". My name is " + this[firstNameSymbol];
      }
  
      get firstName() {
          return this[firstNameSymbol];
      }
  
      get lastName() {
          return this[lastNameSymbol];
      }
  
      static renamePerson(person, lastName) {
          person[lastNameSymbol] = lastName;
      }
  }