archivedAt property
DateTime
archivedAt
Implementation
DateTime get archivedAt => _getAttribute<DateTime>(kArchivedAt, DateTime(0));
pass null
to remove key from attributes
Implementation
set archivedAt(DateTime? x) => (x == null)
? _attributes.remove(kArchivedAt)
: _attributes[kArchivedAt] = x.toIso8601String();