package me.shedaniel.rei.api; import net.minecraft.item.Item; import net.minecraft.item.ItemStack; import java.util.List; public interface IItemRegisterer { public List getItemList(); @Deprecated public List getModifiableItemList(); public ItemStack[] getAllStacksFromItem(Item item); public void registerItemStack(Item afterItem, ItemStack stack); default public void registerItemStack(Item afterItem, ItemStack... stacks) { for(ItemStack stack : stacks) if (stack != null && !stack.isEmpty()) registerItemStack(afterItem, stack); } default public void registerItemStack(ItemStack... stacks) { for(ItemStack stack : stacks) if (stack != null && !stack.isEmpty()) registerItemStack(null, stack); } default boolean alreadyContain(ItemStack stack) { return getItemList().stream().anyMatch(stack1 -> ItemStack.areItemStacksEqual(stack, stack1)); } }