RFeatures

Add an observer object. that will receive notification for the given methodName.

Get a representation by name.

Optionally arguments could be provided if the representation factory requires arguments.

Capture changes and bundle them in a single change in a with statement.

Create a undo item and add it the the undo manager.

Save the current state of the object.

Remove an observer object for a notification.

Capture the current state of the object and create a undo item in a with statement.

Tell the environment that something has changed in the object. The behavior of this method will vary from environment to environment. :

obj.changed()

Subclasses may override this method. If so, they should call the super.