Blacklist

Blacklist your custom items

Create your own blacklist class implement from IBlacklist

public class BlacklistSimilar implements IBlacklist {

	private final List<ItemStack> itemstacks;

	/**
	 * @param itemstacks
	 */
	public BlacklistSimilar(List<ItemStack> itemstacks) {
		super();
		this.itemstacks = itemstacks;
	}

	@Override
	public String getName() {
		return "Similar itemstack";
	}

	@Override
	public boolean isBlacklist(ItemStack itemStack) {
		return this.itemstacks.stream()
				.anyMatch(stack -> stack != null && itemStack != null && stack.isSimilar(itemStack));
	}

}

After your need to use the method registerBlacklist in IBlacklistManager class