<Composite xmlns="http://www.eclipse.org/xwt/presentation"
	xmlns:x="http://www.eclipse.org/xwt">
	<Composite.layout>
		<GridLayout numColumns="2"/>
	</Composite.layout>

	<Composite.Resources>
		<Style x:Key="any" TargetType="Button">
			<!-- Property trigger -->
			<Style.Triggers>
				<Trigger Property="Selection" Value="True">
					<Trigger.Setters>
						<Setter Property="Visible" Value="False" />
					</Trigger.Setters>
				</Trigger>
			</Style.Triggers>
		</Style>
	</Composite.Resources>
	<Button x:Style="CHECK" Text="Trigger"/>
</Composite>