Function live 

pub fn live(
    child: impl IntoUiNode,
    indicator: impl IntoVar<LiveIndicator>,
    atomic: impl IntoVar<bool>,
    busy: impl IntoVar<bool>,
) -> UiNode

P Indicate that the widget can change, how the change can be announced, if atomic the entire widget must be re-read, if busy the screen reader must wait until the change completes.