pub fn assert_native_backend() -> Result<WatcherKind, NonNativeBackend>Expand description
Asserts the compile-time-resolved watcher backend is a native event
backend, returning it for the startup report. Called before any watch
is established; the typed refusal aborts frame dev loudly.
§Errors
NonNativeBackend when the platform resolved anything outside the
sanctioned FSEvents/inotify set — PollWatcher above all.