protected JCommander addSubCommand(String commandName, Command commandObj) {
        commander.addCommand(commandName, commandObj);
        JCommander subCommander = commander.getCommands().get(commandName);
        commandObj.init(subCommander, out);
        return subCommander;
    }
Abstract class for command actions.

@author Nico Bergemann <barracuda415 at yahoo.de>
disunity-cli/src/main/java/info/ata4/disunity/cli/command/Command.java