* signal
* request
* implement
* rename event
* ref
* adjustments based on review
* override subscribed
* move events emit
* fix subscription state
* minor change
* update example for permissions demo
* format & subscriptionState as computed property
* prepare macos build
* unsubscribed event when subscription not allowed
* use widget id instead of state id
* ignore local video view events
* switch remote view visibility also
* use Key for a reliable id
* remove local check
* clean up
* redesign
* check mounted
* remove mount check
* more optimization
* quick wake up
* mark internal
* rename to adaptiveStream
* use events for `VideoTrackRenderer`
* logger
* implemented visibility detection
* optimize code with 1 param debounce func
* stop pending visibility event when disposed
* clean up
* mark internal
* report to track
* call dispose on pub and track
* use internal events to receive visibility events
* clean up visibility for disposed track
* listen to track visibility events on pub
* re-design
* quickly re-enable
* clean up
* clean up
* move internal events & remove unused events
* `TrackUnpublishedEvent` for local tracks
* update example since we have local track unpublish events
* use flutter_webrtc 0.6.9