addNestedEventListener method
Implementation
void addNestedEventListener(StateMachineController controller) {
activeNestedArtboards.forEach((artboard) {
if (artboard.mountedArtboard is RuntimeMountedArtboard) {
(artboard.mountedArtboard as RuntimeMountedArtboard).eventCallback =
(event, target) => _handleNestedEvent(event, target, controller);
}
});
}