import cn.nukkit.event.player.PlayerBucketEmptyEvent; //导入依赖的package包/类
@EventHandler(priority = EventPriority.HIGHEST, ignoreCancelled = true)
public void onBucketEmpty(PlayerBucketEmptyEvent event) {
    Block block = event.getBlockClicked();
    Block b = block.getSide(event.getBlockFace());
    Location location = NukkitUtil.getLocation(b.getLocation());
    PlotArea area = location.getPlotArea();
    if (area == null) {
        return;
    }
    PlotPlayer pp = NukkitUtil.getPlayer(event.getPlayer());
    Plot plot = area.getPlotAbs(location);
    if (plot == null) {
        if (Permissions.hasPermission(pp, C.PERMISSION_ADMIN_BUILD_ROAD)) {
            return;
        }
        MainUtil.sendMessage(pp, C.NO_PERMISSION_EVENT, C.PERMISSION_ADMIN_BUILD_ROAD);
        event.setCancelled(true);
    } else if (!plot.hasOwner()) {
        if (Permissions.hasPermission(pp, C.PERMISSION_ADMIN_BUILD_UNOWNED)) {
            return;
        }
        MainUtil.sendMessage(pp, C.NO_PERMISSION_EVENT, C.PERMISSION_ADMIN_BUILD_UNOWNED);
        event.setCancelled(true);
    } else if (!plot.isAdded(pp.getUUID())) {
        if (Flags.USE.contains(plot, PlotBlock.get(event.getBucket().getId(), 0))) {
            return;
        }
        if (Permissions.hasPermission(pp, C.PERMISSION_ADMIN_BUILD_OTHER)) {
            return;
        }
        MainUtil.sendMessage(pp, C.NO_PERMISSION_EVENT, C.PERMISSION_ADMIN_BUILD_OTHER);
        event.setCancelled(true);
    }
}