public Object execute(ExecutionEvent event) throws ExecutionException {
	final IToolBehaviorProvider featureProvider = getToolBehaviorProvider();

	PictogramElement pes[] = getSelectedPictogramElements(event);
	CustomContext context = new CustomContext(pes);
	IFeature feature = featureProvider.getCommandFeature(context, event.getParameter(HINT_PARAMETER_ID));
	if (feature != null && feature.canExecute(context)) {
		executeOnCommandStack(new GenericFeatureCommandWithContext(feature, context));
	}

	return null;
}