copyWith abstract method

Creates a new instance of the model T with updated properties.

Subclasses must implement this method, providing specific named, optional parameters for each field that can be copied/updated.

Example for a User model:

@override
User copyWith({String? name, int? age}) {
  return User(
    name: name ?? this.name,
    age: age ?? this.age,
    // other fields...
  );
}