How to disconnect someone with a reason

I want to be able to kick people with a 'reason'(The screen that shows up when ur kicked.) how do i modify the text there? This is possible, ive seen in lot of plugins

 

Here: (This is from my kick command) But I guess you can just modify it to your needs.

Code:

Player player = (Player) sender;
                    Player target = player.getServer().getPlayer(args[0]);
                    StringBuilder sb = new StringBuilder();
                    for(int i = 1; i < args.length; i++)
                    {
                        sb.append(args[i]).append(" ");
                    }
                    String msg = sb.toString().trim();
                    if(!(target == null)){
                        target.kickPlayer("Reason: " + msg);
                        return true;
                    }else{
                        player.sendMessage("Player is not online!");
                        return true;
                    }