public class IslandManager {
        private Map<UUID, Island> islands;
        private final IslandNamingListener islandNamingListener;
        public IslandManager(IslandNamingListener islandNamingListener) {
            this.islands = new HashMap<>();
            this.islandNamingListener = islandNamingListener;
        }
    public World createIsland(UUID playerId, File schematicFile) {
        World islandWorld = null;
        try {
            ClipboardFormat format = ClipboardFormats.findByFile(schematicFile);
            if (format != null) {
                try (ClipboardReader reader = format.getReader(Files.newInputStream(schematicFile.toPath()))) {
                    Clipboard clipboard = reader.read();
                    BlockVector3 chestLocationInSchematic = BlockVector3.at(13, 62, -5);
                    List<ItemStack> defaultItems = new ArrayList<>();
                    defaultItems.add(new ItemStack(Material.STONE_SWORD));
                    defaultItems.add(new ItemStack(Material.STONE_AXE));
                    defaultItems.add(new ItemStack(Material.STONE_PICKAXE));
                    defaultItems.add(new ItemStack(Material.STONE_SHOVEL));
                    defaultItems.add(new ItemStack(Material.STONE_HOE));
                    defaultItems.add(new ItemStack(Material.WATER_BUCKET));
                    defaultItems.add(new ItemStack(Material.LAVA_BUCKET));
                    defaultItems.add(new ItemStack(Material.LEATHER_HELMET));
                    defaultItems.add(new ItemStack(Material.LEATHER_CHESTPLATE));
                    defaultItems.add(new ItemStack(Material.LEATHER_LEGGINGS));
                    defaultItems.add(new ItemStack(Material.LEATHER_BOOTS));
                    defaultItems.add(new ItemStack(Material.OAK_SAPLING));
                    defaultItems.add(new ItemStack(Material.SAND, 16));
                    defaultItems.add(new ItemStack(Material.CACTUS, 16));
                    defaultItems.add(new ItemStack(Material.WHEAT_SEEDS, 16));
                    defaultItems.add(new ItemStack(Material.BONE_MEAL, 16));

                    World bukkitWorld = Bukkit.getWorlds().isEmpty() ? null : Bukkit.getWorlds().get(0);
                    if (bukkitWorld != null) {
                        EditSession editSession = WorldEdit.getInstance().newEditSession(BukkitAdapter.adapt(bukkitWorld));
                        com.sk89q.worldedit.world.block.BlockState chestBlock = clipboard.getBlock(chestLocationInSchematic);

                        // create the island world and paste the modified schematic
                        WorldCreator worldCreator = new WorldCreator("IslandWorld_" + playerId.toString());
                        islandWorld = Bukkit.createWorld(worldCreator);

                        if (chestBlock.getBlockType() == BlockTypes.CHEST && islandWorld != null) {
                            Location chestLocation = BukkitAdapter.adapt(islandWorld, chestLocationInSchematic).toVector().toLocation(islandWorld);
                            Block block = islandWorld.getBlockAt(chestLocation);
                            if (block.getState() instanceof Chest) {
                                Chest chest = (Chest) block.getState();
                                Inventory inventory = chest.getInventory();

                                inventory.clear();

                                for (ItemStack item : defaultItems) {
                                    inventory.addItem(item.clone());
                                }
                            }
                        } else {
                            // case when the block at the specified location is not a chest
                            System.out.println("Chest not in correct location in schematic!");
                        }
                        try (EditSession pasteSession = WorldEdit.getInstance().newEditSession(new BukkitWorld(islandWorld))) {
                            Operation operation = new ClipboardHolder(clipboard)
                                    .createPaste(pasteSession)
                                    .to(BlockVector3.at(0, 64, 0))
                                    .ignoreAirBlocks(false)
                                    .build();
                            Operations.complete(operation);
                        }
                    } else {
                        // case when there are no loaded worlds in Bukkit
                        System.out.println("No world loaded to bukkit!");
                    }
                }
            } else {
                // unsupported schematic format
                System.out.println("Unsupported schematic format!");
            }
        } catch (IOException | WorldEditException e) {
            e.printStackTrace();
        } finally {
            if (islandWorld != null) {
                islands.put(playerId, new Island(islandWorld));
            } else {
                // case when island creation fails
                System.out.println("Island creation failed!");
            }
        }
        return islandWorld;
    }