var x = {
  get a() {},
  set a(x) {},
  get a() {},
  set a(x) {},
  a: 3,
  b: 4,
  get b() {},
  set b(x) {},
  get c() {},
  c: 5,
  set c(x) {},
  set d(x) {},
  d: 6,
  get d() {}
};