observe
abstract fun observe(scope: String): ERROR CLASS: Symbol not found for Flow<net/zagart/storage/Snapshot>
abstract fun observe(scope: String, keys: Set<Observable>): ERROR CLASS: Symbol not found for Flow<net/zagart/storage/Snapshot>
abstract fun observe(scope: String, block: ObservationBuilder.() -> Unit): ERROR CLASS: Symbol not found for Flow<net/zagart/storage/Snapshot>