@Override
  public void putBlockNumberMilestone(final long blockNumber, final ProtocolSpec protocolSpec) {
    throw new UnsupportedOperationException(
        "Should not use TransitionProtocolSchedule wrapper class to create milestones");
  }
Put blockNumber milestone.

@param blockNumber the block or timestamp
@param protocolSpec the protocol spec
consensus/merge/src/main/java/org/hyperledger/besu/consensus/merge/TransitionProtocolSchedule.java