If it were possible to create worlds async with this method then many worlds management plugins would have this already integrated
The command /asyncworld throws an exception if no argument is given
There is no TabCompleter which would definitely be appropriate in this case
Appreciate your review. And yes I noticed that it's not possible to create worlds asynchronously so I will remove that generator option. And the command throws an expection because I accidently check for arg lenght 5 although there are only 4 arguments. Going to fix these issues soon and also probably going to add tab complete. Thanks for your honesty!