Not generating code for the final fields and the getters

[iLoveDocs]

Minimum reproducible code:

@JsonSerializable()
class Foo {
  final int a = 0;
  int get b => 42;
}

Problem:

The generated code doesn't include any of the a or b field:

Foo _$FooFromJson(Map<String, dynamic> json) => Foo();

Map<String, dynamic> _$FooToJson(Foo instance) => <String, dynamic>{};

Is this an expected behavior?

Flutter version:

Flutter 2.12.0-4.1.pre • channel beta • https://github.com/flutter/flutter.git
Framework • revision 680962aa75 (4 weeks ago) • 2022-03-16 13:46:03 -0700
Engine • revision e9f57b5d0f
Tools • Dart 2.17.0 (build 2.17.0-182.1.beta) • DevTools 2.11.1

Package version:

6.1.5

Here's the question on the StackOverflow