onTouchRollOut property Null safety

EventStream<TouchEvent> onTouchRollOut

Dispatched when the user moves the point of contact away from an InteractiveObject instance on a touch-enabled device.

You have to opt-in for touch events by setting the InputEventMode to TouchOnly or MouseAndTouch in the stage options.

Implementation

EventStream<TouchEvent> get onTouchRollOut =>
    InteractiveObject.touchRollOut.forTarget(this);