Json_serializable.dart: @JsonKey(fromJson) Arguments of a constant creation must be constant expressions.

[lukepighetti]

I'm trying to use @JsonKey(fromJson: (j)=>j) to make the entire json map available as a field. I get the error Arguments of a constant creation must be constant expressions.

Am I doing something wrong? Or has there been an API change?

@JsonSerializable(createToJson: false)
class Entry {
  final int id;

  @JsonKey(fromJson: _dataFromJson)
  final Map<String, dynamic> data;

  Entry(this.id, this.data);

  _dataFromJson(Map<String, dynamic> input) => input;

  factory Entry.fromJson(Map<String, dynamic> json) => _$EntryFromJson(json);
}

[lukepighetti]

Ah, its gotta be a static member.