@Override
  public BesuController build() {
    final BesuController controller = super.build();
    postMergeContext.setSyncState(syncState.get());
    return controller;
  }
Create transition mining coordinator.

@param protocolSchedule the protocol schedule
@param protocolContext the protocol context
@param transactionPool the transaction pool
@param miningConfiguration the mining parameters
@param syncState the sync state
@param backwardSyncContext the backward sync context
@param ethScheduler the scheduler
@return the mining coordinator
app/src/main/java/org/hyperledger/besu/controller/MergeBesuControllerBuilder.java