private GenesisConfigOptions readGenesisConfigOptions() {
    try {
      return genesisConfigSupplier.get().getConfigOptions();
    } catch (final Exception e) {
      throw new ParameterException(
          this.commandLine, "Unable to load genesis file. " + e.getCause());
    }
  }
Returns a network interface checker that can be used to validate P2P options.

@return A {@link P2PDiscoveryOptions.NetworkInterfaceChecker} that checks if a network
    interface is available.
app/src/main/java/org/hyperledger/besu/cli/BesuCommand.java