MinecraftForge HarvestDropsEvent

package com.cad97.spawnercraft;

import net.minecraft.block.BlockMobSpawner;
import net.minecraft.entity.Entity;
import net.minecraft.entity.EntityList;
import net.minecraft.item.ItemStack;
import net.minecraftforge.event.entity.living.LivingDropsEvent;
import net.minecraftforge.event.world.BlockEvent.HarvestDropsEvent;
import cpw.mods.fml.common.eventhandler.SubscribeEvent;

public class EssenceDrop
{
	@SubscribeEvent
	public void on(HarvestDropsEvent event)
	{
		if (event.block instanceof BlockMobSpawner)
		{
			event.drops.add(new ItemStack(SpawnerCraft.mobCage, 1));
		}
	}
}