groups property Null safety

List<CowGroup> groups

@JsonKey(name: 'groups', fromJson: groupsFromJson, toJson: groupsToJson), read / write

개체가 속한 소 그룹의 리스트

Implementation

@JsonKey(name: 'groups', fromJson: groupsFromJson, toJson: groupsToJson)
List<CowGroup> groups;