@Override
public void execute(CommandSender sender, List<?> params) throws CommandException {
Player player = super.getSenderAsPlayer(sender);
String type = (String)params.get(0);
if (type.equalsIgnoreCase("normal")) {
player.changeDimension(DIMENSION_NORMAL);
} else if (type.equalsIgnoreCase("nether")) {
player.changeDimension(DIMENSION_NETHER);
} else if (type.equalsIgnoreCase("end")) {
player.changeDimension(DIMENSION_END);
} else {