import 'dart:convert';

              // Example class representing an object
              class Person {
                final String name;
                final int age;

                Person({required this.name, required this.age});

                // Convert the object to a JSON format
                Map<String, dynamic> toJson() {
                  return {
                    'name': name,
                    'age': age,
                  };
                }
              }

              void main() {
                // Create an instance of the Person class
                Person person = Person(name: 'John', age: 30);

                // Convert the object to JSON
                String jsonStr = jsonEncode(person.toJson());

                // Print the JSON string
                print(jsonStr);
              }