in src/main/scala/org/apache/pekko/persistence/dynamodb/journal/DynamoDBJournal.scala [163:168]
private def listAll(persistenceId: String): Future[ListAllResult] =
for {
low <- readAllSequenceNr(persistenceId, highest = false)
high <- readAllSequenceNr(persistenceId, highest = true)
seqs <- listAllSeqNr(persistenceId)
} yield ListAllResult(persistenceId, low, high, seqs)