EntityMoveEvent with bkcommonlib (FallingSand)

So what i'm trying to do is: When a sand goes above sky limit it should die/remove or whatever.. but how do i do this with bkcommonlib?

Code (Text):

    @EventHandler
    public void Sky(EntityMoveEvent event){
        Entity entity = (Entity) event.getEntity();
        if(entity instanceof FallingBlock){
            if(entity.getLocation().getBlockY() >= 255){
                entity.remove();
            }
        }
    }
}