private void createLogsSubscriptionService(
      final Blockchain blockchain, final SubscriptionManager subscriptionManager) {

    final LogsSubscriptionService logsSubscriptionService =
        new LogsSubscriptionService(subscriptionManager);

    // monitoring public logs
    blockchain.observeLogs(logsSubscriptionService);
  }
Gets fixed nodes. Visible for testing.

@param someFixedNodes the fixed nodes
@param moreFixedNodes nodes added to fixed nodes
@return the fixed and more nodes combined
app/src/main/java/org/hyperledger/besu/RunnerBuilder.java