getMetadata: () => scheduler.keepUnstableUntilFirst( scheduler.runOutsideAngular( from(scheduler.zone.runOutsideAngular(() => ref.getMetadata())) ) ),
getDownloadURL: () => scheduler.keepUnstableUntilFirst( scheduler.runOutsideAngular( from(scheduler.zone.runOutsideAngular(() => ref.getDownloadURL())) ) ),