Making scroller of spark list visible by default

I have a spark.components.List component on which I would like the vertival scroll to be visible by default开发者_JAVA百科. Any ideas?

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You can do this via its scroller verticalScrollPolicy style. Try this to always show the vertical scrollbar for all lists:

@namespace s "library://ns.adobe.com/flex/spark";

s|List s|Scroller {
    verticalScrollPolicy: on;
}