@Override
  public BesuControllerBuilder requiredBlocks(final Map<Long, Hash> requiredBlocks) {
    super.requiredBlocks(requiredBlocks);
    return propagateConfig(z -> z.requiredBlocks(requiredBlocks));
  }
Instantiates a new Transition besu controller builder.

@param preMergeBesuControllerBuilder the pre merge besu controller builder
@param mergeBesuControllerBuilder the merge besu controller builder
app/src/main/java/org/hyperledger/besu/controller/TransitionBesuControllerBuilder.java