onBecomeObserved method
void Function()
onBecomeObserved(
- void fn()
Implementation
void Function() onBecomeObserved(void Function() fn) =>
_addListener(_ListenerKind.onBecomeObserved, fn);
void Function() onBecomeObserved(void Function() fn) =>
_addListener(_ListenerKind.onBecomeObserved, fn);