Epicmoofish

I am making a custom event that I need to fire during BlockState.getShape() to allow me to edit vanilla block shapes. I wasn't able to find an event that allows me to do this so I have to make one. After researching how to have it fire from a vanilla class, I found that you had to patch vanilla classes, but I couldn't find any information on how to do this. If there is any other way to do this other than patching vanilla classes, that will work too but I couldn't find any other way. Thanks

I'm on mac, I have the same error(that's how I got to this thread) but I tried cleaning and it isn't fixing it?

So I want to make a world-specific config that the player can edit so Capabilities isn't really an option. The closest thing I could find was World.getWorldInfo().getWorldName(), but this only gives the display name and I need the file save name. Thanks for any help.