@Test
  public void transactionRollbackEmpty() throws Exception {
    try (final KeyValueStorage store = createStore()) {
      final KeyValueStorageTransaction tx = store.startTransaction();
      tx.rollback();
    }
  }
Transaction rollback empty.

@throws Exception the exception
testutil/src/main/java/org/hyperledger/besu/kvstore/AbstractKeyValueStorageTest.java