public BesuControllerBuilder requiredBlocks(final Map<Long, Hash> requiredBlocks) {
    this.requiredBlocks = requiredBlocks;
    return this;
  }
Required blocks besu controller builder.

@param requiredBlocks the required blocks
@return the besu controller builder
app/src/main/java/org/hyperledger/besu/controller/BesuControllerBuilder.java