toJson method
Implementation
@override
Map<String, dynamic> toJson() => <String, dynamic>{
'active_usernames': activeUsernames.map((item) => item).toList(),
'disabled_usernames': disabledUsernames.map((item) => item).toList(),
'editable_username': editableUsername,
'collectible_usernames': collectibleUsernames.map((item) => item).toList(),
'@type': constructor,
};