(ProtocolLib) How do I cancel Item drop?

For damage effects, I'm using item drops, but with this code, I use dropItemNaturally because I couldn't use PacketWrapper to spawn Items (due needs of generating Entity ID and somethings like that).

I'm trying to deny the drop from spawning for the player using:

Code:java

 pl.getProtocolManager().addPacketListener(new PacketAdapter(pl, PacketType.Play.Server.SPAWN_ENTITY) {
@Override
public void onPacketSending(PacketEvent event) {
Jogador jogador = CustomServer.getJogador(event.getPlayer());
WrapperPlayServerSpawnEntity spawnEntity = new WrapperPlayServerSpawnEntity(event.getPacket());
pl.getLogger().info("Effects: " + (jogador.getStats().isReceivingEffects()) + " Contains? " + (itemEffectQueue.containsItem(spawnEntity.getEntityID())));
if(itemEffectQueue.containsItem(spawnEntity.getEntityID()) && !jogador.getStats().isReceivingEffects()) {
event.setCancelled(true);
pl.getLogger().info("Cancelled");
}
}
});

I know the entity ID is wrong, but the Item's ID isn't the entity ID?

@EDIT: the packet is sent before I add it to the list. Any idea on how to workarround?

 

Ummm....why not just use Bukkit's event? Lot easier than dealing with packets....

 

I want people who don't want effects to not see the items, I already use events so people won't get the item dropped.