Fermenter

I found this code mods.immersiveengineering.Fermenter.addRecipe(IItemStack output, ILiquidStack fluid, IIngredient input, int energy); but i want to add only a liquid output.
I tried to use <minecraft:air> but the game told me that i can't use a null output.
How can i add a crafting like the original crafting of Fermenter ? [ Sugar = Ethanol (without item output) ]

Try using null instead of <minecraft:air> and see if that works.

okay, i try now

THANKS, it works but i suggest to add this info to the Craftweaker wiki.

I don't maintain that wiki, you should approach whoever does =P