Make custom class Observable or Reactive with Constructure (GET X)

Make custom class Observable or Reactive without Constructure (GET X) 

{

Class Variable Access Without Constructure : 

Cteate Instance of class: final student=Student(name: "Avi",age: 26).obs;

Access : student.value.name

                Obx(() => Text(
                    "Name is ${student.value.name}",
                    style: TextStyle(fontSize: 24),
                  )),

}

1. Create Class

import 'package:get/get.dart';
class Student {
  
//   with constructor
  RxString name="".obs;
  RxInt age=0.obs;

  Student({required String name, required int age}) {
    this.name.value = name;
    this.age.value = age;
  }
}

2. Calling

import 'package:flutter/material.dart';
import 'package:get/get.dart';
import 'package:getx/model/student.dart';
import 'package:getx/page/student_page.dart';

void main() {
  runApp(GetMaterialApp(
    debugShowCheckedModeBanner: false,
    home: MyApp(),
  ));
}

class MyApp extends StatelessWidget {
  MyApp({super.key});
  final student=Student(name: "Avi",age: 26).obs;

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text("Get X"),
        backgroundColor: Colors.redAccent,
      ),
      body: SafeArea(
        child: SingleChildScrollView(
          child: Column(
            children: [
              Text("Welcome Avinash in Get X Tutorials"),
              Obx(() => Text(
                    "Name is ${student.value.name}",
                    style: TextStyle(fontSize: 24),
                  )),
              SizedBox(
                height: 10,
              ),
              Obx(() => Text(
                    "Age = ${student.value.age}",
                    style: TextStyle(fontSize: 20),
                  )),
              ElevatedButton(
                child: Text("Upper Name"),
                onPressed: () {tudent.update((student) {
                 student?.name.value = student.name.value ==student.name.value.toUpperCase()
                  ? student.name.value.toLowerCase()
                  : student.name.value.toUpperCase();
              });
                or
            student.refresh(): // for update value
;                 },
              ),
            ],
          ),
        ),
      ),
    );
  }
}