class Person: Codable {
	var name: String = ""
	var age: Int = 0
}

let jsonStr = """
		          {"name":"Yang","age":99}
		          """
if let a = YsonObject(jsonStr) {
  a.put("age", 100)
	let s = a.yson
	print(s)
	if let p: Person = Yson.fromYson(Person.self, a) {
	  print(p.name)
		print(p.age)
		let ss = p.toYsonObject.yson
		print(ss)
	}
 }