Will it serialise deterministically?

serialise.scala

conn => {
  conn.sendQuery(tableInsert(1)).flatMap {
    _ =>
      conn.sendQuery(tableInsert(2))
  }
  
  conn.sendQuery(tableInsert(3)).flatMap {
    _ =>
      conn.sendQuery(tableInsert(4))
  }
}
  
// Inspiration taken from
// https://github.com/mauricio/postgresql-async/blob/master/postgresql-async/src/test/scala/com/github/mauricio/async/db/postgresql/TransactionSpec.scala