trait PushBoundValueToCollector: PushBoundValueToCollectorDB<<PgConnection as Connection>::Backend> + PushBoundValueToCollectorDB<<SqliteConnection as Connection>::Backend> { }
trait PushBoundValueToCollector: PushBoundValueToCollectorDB<<PgConnection as Connection>::Backend> + PushBoundValueToCollectorDB<<SqliteConnection as Connection>::Backend> { }