public void ChangeFromClassToInterface(Classifier @class)
{
@class.IsInterface = true;
// the class itself cannot have a base class any more
@class.ClearBaseClass(_messageSystem);
// find all derived classes with this base class
var derivedClasses = _classifiers.FindAllDerivedClassifiers(@class);
foreach (var derivedClass in derivedClasses)
{
derivedClass.ClearBaseClass(_messageSystem);
derivedClass.AddInterfaceImplementation(@class, _messageSystem);
}
// fire the notification at the end, because this will change all
// existing classifier list items
_messageSystem.Publish(@class, new ClassToInterfaceEvent(@class.Name));
}