Bug 279452 [Compatibility] Parameterized command mechanism support
Parameterized commands like showView need to be able to access their parameters (like the view ID) PW
bundles/org.eclipse.e4.ui.workbench.renderers.swt/src/org/eclipse/e4/workbench/ui/renderers/swt/HandledContributionItem.java
return c;
	}
	protected boolean canExecuteItem(Display display) {
		final MCommand command = model.getCommand();
		if (command == null) {
			return false;
		}
		IEclipseContext context = getFocusContext(display);
		EHandlerService hs = (EHandlerService) context
				.get(EHandlerService.class.getName());
		if (hs == null) {
			return true;
		}
		return hs.canExecute(command.getId());
	}
	protected Object executeItem(Display display) {
		final MCommand command = model.getCommand();
		if (command == null) {
			return null;
		}
		IEclipseContext context = getFocusContext(display);
		EHandlerService hs = (EHandlerService) context
				.get(EHandlerService.class.getName());
		if (hs == null) {
			return null;
		}
		return hs.executeHandler(command.getId());
	}
}