if(!(sender instanceof Player))
throw new FastCommandException("This command can only be performed by a player!");
if(!sender.hasPermission("craftbook.mech.signcopy.edit"))
throw new CommandPermissionsException();
if(!SignCopier.signs.containsKey(sender.getName()))
throw new FastCommandException("You haven't copied a sign!");
int line = context.getInteger(0, 0);