* Migrate to Scala
 * Fix @Ignore'ed JUnit tests
 * TODO/XXX/FIXME/JE_TEST
 * begin/end JE only
 * Kafka for log
 * Remove all @Deprecated features

 * TravisCI
 * Jepsen
 * Nested transactions

 * http://dbmsmusings.blogspot.com/2019/06/correctness-anomalies-under.html