[news.eclipse.modeling.gmf] How do I forbid deletion of elements?

["Alexander Dotor" <alexander.dotor@xxxxxxxxxxxxxxx>]

Hi,

I want to forbid the deletion of model elements. How do I achieve this?

I tried to replace the Default command via an edit helper but this works 
only if I call the delete action of the object's context menu. Prsssing 
"Del" seems to call an entirely different command.

Greetings,
Alexander