/*------------------------------------------------------------------------------
 Copyright (c) CovertJaguar, 2011-2016

 This work (the API) is licensed under the "MIT" License,
 see LICENSE.md for details.
 -----------------------------------------------------------------------------*/

package mods.railcraft.api.crafting;

import net.minecraft.item.ItemStack;
import net.minecraftforge.fluids.FluidStack;

import javax.annotation.Nullable;
import java.util.List;

/**
 *
 * @author CovertJaguar <http://www.railcraft.info>
 */
public interface ICokeOvenCraftingManager {

    void addRecipe(ItemStack input, boolean matchDamage, boolean matchNBT, ItemStack output, FluidStack liquidOutput, int cookTime);

    @Nullable
    ICokeOvenRecipe getRecipe(ItemStack stack);

    List<? extends ICokeOvenRecipe> getRecipes();
}

@@ -662,16 +662,26 @@
  output,
+ @Nullable
  FluidSt

Add a nullable to fluid stack