I would like to put a tab on the sample.

I would like to put a tab on the sample RSS reader. is there something good way?

<Alloy>
    <!-- Mobileweb -->
    <TabGroup>
    <Tab>
    <Window id="index" platform="mobileweb">
        <NavigationGroup id="navgroup">
            <Require src="master" id="master"/>
        </NavigationGroup>
    </Window>
 
    <!-- Android -->
    <Require id="master" src="master" platform="android"/> 
  </Tab>
  </TabGroup>
</Alloy>