@EventHandler
 public Message onBlockAction(BlockActionEvent event) {
   int id = VanillaMaterials.getMinecraftId(event.getMaterial());
   if (id == -1) {
     return null;
   } else {
     return new BlockActionMessage(
         event.getBlock(), (short) id, event.getData1(), event.getData2());
   }
 }
 public void play(List<Player> players, Point position, BlockMaterial material) {
   int id = VanillaMaterials.getMinecraftId(material);
   if (id != -1) {
     this.play(players, position, id);
   }
 }