@Override
 public void onChunkUnload() {
   super.onChunkUnload();
   if (worldObj.isRemote && this instanceof IHarvestAreaContainer) {
     MineFactoryReloadedClient.removeTileFromAreaList((IHarvestAreaContainer) this);
   }
 }
 @Override
 public void validate() {
   super.validate();
   if (worldObj.isRemote && this instanceof IHarvestAreaContainer) {
     MineFactoryReloadedClient.addTileToAreaList((IHarvestAreaContainer) this);
   }
 }