Flex :: Deselecting Toggle Button Through UIComponent Reference

I've got some buttons that have toggle set to true. I'm trying to re-set the button's state to unselected. But, I can't access the button directly like:
button.selected=false.
I'm accessing the HBox's children which are the buttons. UIComonent doesn't have a selected property.

So, how do I de-select the toggle in this bit of code below?
for (var j : int=0; j < theHBox.numChildren; j++){
var child : DisplayObject = theHBox.getChildAt(j);
var myButton:UIComponent = child as UIComponent;
myButton.setStyle("borderColor", "blue");
myButton.visible = true;
}