public MLGRushCommand() {
    super("mlgrush");
    super.setPermission("mlg.admin");
    super.permissionMessage(Component.text("Can't do this!"));
    super.setUsage("§7/mlgrush <forcestart|forcestop|seearenas|set> [<arena>] [<red/blue/corners1/corners2>]");
}

@Override
public boolean execute(@NotNull CommandSender sender, @NotNull String aliases, @NotNull String[] args) {
    if (!(sender instanceof Player) || args.length == 0)
        return false;

    if (!subCommands.containsKey(args[0]))
        return false;

    subCommands.get(args[0]).invoke(sender, args);
        return true;
}