question: public static RecipeRuneAltar registerRuneAltarRecipe ( ItemStack output , int mana , Object ... inputs ) { Preconditions . checkArgument ( inputs . length <= 16 ) ; RecipeRuneAltar recipe = new RecipeRuneAltar ( output , mana , inputs ) ; runeAltarRecipes . add ( recipe ) ; return recipe ; }
target:  Registers a Rune Altar Recipe.