open-easing-function in CSS

[levancho]

I want to defined easing functions in comboBox css, but it does not seem to
work here is "
ComboBox {
cornerRadius: 0;
openDuration: 745;
closeDuration: 880;
dropdownStyleName: "myComboBoxDropDowns";
open-easing-function : "Bounce.easeOut";
close-easing-function : "Bounce.easeIn";

}
example above does not give compiler erro but it also does not work
can anyone tell me how do I make it work?

[levancho]

bump,

BTW in css this variation also does not work :
openEasingFunction: "Bounce.easeOut";
closeEasingFunction: "Bounce.easeIn";

neither this :

openEasingFunction: "mx.effects.easing.Bounce.easeOut";
closeEasingFunction: "mx.effects.easing.Bounce.easeIn";