public StubGenesisConfigOptions terminalTotalDifficulty(
      final UInt256 updatedTerminalTotalDifficulty) {
    terminalTotalDifficulty = Optional.of(updatedTerminalTotalDifficulty);
    return this;
  }
Terminal total difficulty stub genesis config options.

@param updatedTerminalTotalDifficulty the updated terminal total difficulty
@return the stub genesis config options
config/src/main/java/org/hyperledger/besu/config/StubGenesisConfigOptions.java