Type Hints!

Hello,
I saw some users with type-hints like @AppleDevelops while typing commands. Could someone please teach me how to do that with my command.

 

https://twitter.com/AppleDevelops/status/877214412549103616

 

https://forums.pmmp.io/threads/temporary-mcpe-command-syntax-checking.2320/

 

@Sandertv Could you show me a example of that in a plugin with a command.

 

I just don’t understand

My question is how does what sander put link to commands?

 

If you'd read you could see an example in my BlockSniper plugin on the 1.4.0 branch. The code given in my tutorial is almost copy paste code already though, I don't see how you need more examples.