[news.eclipse.modeling.gmf] Change decorator being undone

[jrsalazares@xxxxxxxxx (Jose Salazar)]

Hello,

I've installed an EditPolicy OPEN_ROLE in a connection to change the 
TargetDecoration and others properties when I double-click him.

My problem is when I do 'Ctrl+Z' the target decoration doesn't change but 
the others properties does it (because the properties I change it with a 
undoable command).

In the FAQ page there is a problem like mine to change the color line, it 
uses ChangePropertyValueRequest and it passes the property ID and its 
value. There is an ID_LINECOLOR but not an ID_LINEDECORATOR, so:

how can I change the target decoration with undone possibility?

Thanks in advance.