presto-main/src/main/java/io/prestosql/transaction/InMemoryTransactionManager.java/InMemoryTransactionManager/createTestTransactionManager
class InMemoryTransactionManager:    public static TransactionManager createTestTransactionManager(CatalogManager catalogManager)
    {
        // No idle checks needed
        return new InMemoryTransactionManager(new Duration(1, TimeUnit.DAYS), 1, catalogManager, directExecutor());
    }