angular.dart NgTwoWay and NgAttr deprecated?
NgAttr, NgOneWay, NgTwoWay, etc. were marked deprecated in preparation to the new bind-* syntax, which is not implemented, yet. So deprecation is arguably a bit premature, since there's no action for users to take, but I guess it is a first warning of the impending major breaking change.
As of AngularDart 0.13.0, these attributes are no longer marked as deprecated.
As Pavel pointed out, the deprecation was premature. We may re-deprecate them when we have a better way of doing things, but for now you can use them without that nagging feeling that you are doing something wrong.
There is a new milestone for bind-* syntax which has issues discussing these changes, it may not be actually removed until 1.0 is what I feel.