private Inventory getFuelInventory(Player player) {

    if (isValidFuelJacket(player.getInventory().getChestplate())) {

      FileConfiguration fuelConfig = getFuelConfig(player);
      Material jacket = player.getInventory().getChestplate().getType();

      int jacketSize = getFuelJacketSize(jacket);
      String jacketType = getFuelJacketConfigString(jacket);

      if (fuelConfig.get(jacketType) != null) {

        Inventory fuelInventory;
        ArrayList<ItemStack> itemStack = new ArrayList<>();

        itemStack.addAll(
            fuelConfig
                .getList(jacketType)
                .stream()
                .map(fuelCurrentItem -> (ItemStack) fuelCurrentItem)
                .collect(Collectors.toList()));

        fuelInventory =
            Bukkit.createInventory(
                player,
                jacketSize,
                "" + ChatColor.DARK_RED + ChatColor.BOLD + "Rocket Boot Fuel Jacket");
        fuelInventory.setContents(itemStack.toArray(new ItemStack[itemStack.size()]));

        return fuelInventory;
      }
    }

    return null;
  }
  public void reloadFlyZones(boolean showMessage) {

    RocketInit.rocketZoneLocations.clear();
    List<String> zoneList = RocketInit.getPlugin().getConfig().getStringList("zones");

    if (zoneList.size() > 0) {

      for (String zone : zoneList) {

        String[] zoneSection = zone.split("\\|");

        final Location zoneLocationStart =
            new Location(
                Bukkit.getWorld(zoneSection[1]),
                Integer.parseInt(zoneSection[2]) - 25,
                Integer.parseInt(zoneSection[3]) - 5,
                Integer.parseInt(zoneSection[4]) - 25);

        final Location zoneLocationEnd =
            new Location(
                Bukkit.getWorld(zoneSection[1]),
                Integer.parseInt(zoneSection[2]) + 25,
                Integer.parseInt(zoneSection[3]) + 50,
                Integer.parseInt(zoneSection[4]) + 25);

        RocketInit.rocketZoneLocations.put(
            UUID.fromString(zoneSection[0]),
            new ConcurrentHashMap<Location, Location>() {
              {
                put(zoneLocationStart, zoneLocationEnd);
              }
            });
      }

      if (showMessage) RocketInit.registerMap.put("zone", zoneList.size());
    }
  }
  public void disableRocketBoots(
      Player player,
      Boolean keepUsage,
      Boolean keepPower,
      Boolean keepFlight,
      Boolean keepVariant,
      Boolean keepEnhancement) {

    UUID playerUUID = player.getUniqueId();

    if (!keepUsage && RocketInit.rocketUsage.contains(playerUUID))
      RocketInit.rocketUsage.remove(playerUUID);

    if (RocketInit.rocketSprint.containsKey(playerUUID)) RocketInit.rocketSprint.remove(playerUUID);

    if (!keepPower && RocketInit.rocketPower.containsKey(playerUUID))
      RocketInit.rocketPower.remove(playerUUID);

    if (!RocketInit.rocketFire.isEmpty()) RocketInit.rocketFire.clear();

    if (RocketInit.rocketWater.contains(playerUUID)) RocketInit.rocketWater.remove(playerUUID);

    if (RocketInit.rocketRepair.containsKey(playerUUID)) RocketInit.rocketRepair.remove(playerUUID);

    if (!keepEnhancement && RocketInit.rocketEnhancement.containsKey(playerUUID))
      RocketInit.rocketEnhancement.remove(playerUUID);

    if (!keepVariant && RocketInit.rocketVariant.containsKey(playerUUID)) {

      switch (RocketInit.rocketVariant.get(playerUUID)) {
        case ENDER:
          player.removePotionEffect(PotionEffectType.NIGHT_VISION);
          player.removePotionEffect(PotionEffectType.HEALTH_BOOST);
          break;

        case ZERO:
          player.removePotionEffect(PotionEffectType.CONFUSION);
          player.removePotionEffect(PotionEffectType.DAMAGE_RESISTANCE);
          player.removePotionEffect(PotionEffectType.INCREASE_DAMAGE);
          break;

        case STEALTH:
          for (Player onlinePlayer : Bukkit.getOnlinePlayers()) onlinePlayer.showPlayer(player);
          break;

        case DRUNK:
          player.removePotionEffect(PotionEffectType.CONFUSION);
          player.removePotionEffect(PotionEffectType.FAST_DIGGING);
          break;

        case BOOST:
          player.removePotionEffect(PotionEffectType.HEAL);
          break;

        case RUNNER:
          player.removePotionEffect(PotionEffectType.SPEED);
          break;
      }

      RocketInit.rocketVariant.remove(playerUUID);
    }

    if (player.isOnline() && gamemodeCheck.check(player, GameMode.SURVIVAL, GameMode.ADVENTURE)) {

      for (Player onlinePlayer : Bukkit.getOnlinePlayers()) onlinePlayer.showPlayer(player);

      player.setFlySpeed(0.1f);
      player.setFlying(false);
      if (!keepFlight) player.setAllowFlight(false);

      player.setNoDamageTicks(100);
      player.setFallDistance(0);
    }
  }