private boolean check(CommandSender sender, String[] args) {
   if (args.length != 1) return false;
   if (!(sender instanceof Player)) {
     boolean isBanned = plugin.isTempBanned(args[0]);
     if (isBanned) {
       sender.sendMessage(
           args[0]
               + " is temp banned for having "
               + plugin.getImprisonedCount(args[0])
               + " imprisoned accounts: "
               + plugin.getImprisonedAltsString(args[0]));
     } else {
       sender.sendMessage(args[0] + " is not temp banned");
     }
     return true;
   }
   return false;
 }