gistfile1.as

def getSnapshotForTable(key: SnapshotKey, tableName: TableName): Either[AmazonClientException, Option[Snapshot]] = ???

def getSnapshot(key: SnapshotKey): Either[AmazonClientException, Option[Snapshot]] = {
  val fallbackTableName = tableNameFactory.tableConfig.fallbackTableName.map(PrefixOnlyTableName(_, ""))
  val tableNames: List[TableName] = (List(Some(tableNameFactory.fromSnapshotKey(key))) :+ fallbackTableName).flatten
  
  val futures = Future.sequence(tableNames.map(tableName => {
    Future { getSnapshotForTable(key, tableName) }
  }))

  val results: List[Either[AmazonClientException, Option[Snapshot]]] = Await.result(futures, Duration.Inf)
  
  ?????????????
  
  How to take the first one that has a Some(snapshot), else the first Error?
}