@Override
  public void run() {
    spec.commandLine().usage(out);
  }
Instantiates a new Rlp sub command.

@param out the PrintWriter where the output of subcommand will be reported
@param in the InputStream which will be used to read the input for this subcommand.
app/src/main/java/org/hyperledger/besu/cli/subcommands/rlp/RLPSubCommand.java