Images/Icons in EXTJS Tree code

I'm trying to do a tree in EXTJS.(Ex: World > Continents >开发者_如何学JAVA; Country > States ), but i don't have that much idea to make it.

What is this 'icon-basket'?

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simple way: Just look at this example. If you want icons - just add "icon":"http://url.rl/rl" at your JSON for each node of tree.