this.gui.setContent(); alternative and problem with addItems

[DizzyMontage13]

if(!controlItems.isEmpty()) {
this.gui.setContent(controlItems);
}

public BansGui(LogsManager logsManager) {
    this.logsManager = logsManager;
    this.gui = PagedGui.items()
            .setStructure(
                    "# # # # # # # # #",
                    "# x x x x x x x #",
                    "# x x x x x x x #",
                    "# x x x x x x x #",
                    "# # # < # > # # #"
            ).addIngredient(
                    '#', new SimpleItem(new ItemBuilder(Material.BLACK_STAINED_GLASS_PANE).setDisplayName(" "))
            ).addIngredient(
                    '<', new BackItem()
            ).addIngredient(
                    'x', Markers.CONTENT_LIST_SLOT_HORIZONTAL
            ).addIngredient(
                    '>', new ForwardItem()
            ).build();
}

private void prepareGui() {
    for(Logs logs : this.logsManager.getLogs().values()) {



        this.gui.addItems(
            new ControlItem<>() {

                @Override
                public void handleClick(@NotNull ClickType clickType, @NotNull Player player, @NotNull InventoryClickEvent event) {
                    if(clickType.isLeftClick()) {
                        ChatUtil.sendMessage(player, "&8>> &cPowod: &7" + logs.getReason());
                    }
                }

                @Override
                public ItemProvider getItemProvider(Gui gui) {

                    return new ItemBuilder(logs.getLogsType().getMaterial())
                    .setDisplayName(ChatUtil.fixColor("&f>> &e" + logs.getPunishment() + " &f<<"))
                    .setLegacyLore(
                        ChatUtil.fixColors(
                            Arrays.asList(
                                    "&8>> &7Rodzaj kary: &c" + logs.getLogsType().getName(),
                                    "&8>> &7Administrator: &c" + logs.getPunisher(),
                                    "&8>> &7Powod: &c" + logs.getReason(),
                                    "&8>> &7Czas rozpoczecia: &c" + TimeUtil.getDateFromLong(logs.getTimeStarted().toEpochMilli()),
                                    "&8>> &7Czas: &c" + (logs.getTime() >= 0
                                            ? "PERMANENTNIE" : (logs.getTime() > System.currentTimeMillis()
                                            ? TimeUtil.secondsToString(logs.getTime() - System.currentTimeMillis()) : "zakonczony")
                            )
                        )
                    ));
                }

            }
        );
        

    }
}

public void openGui(Player player) {
    Window window = Window.single()
            .setTitle(ChatUtil.fixColor("&f>> &4Historia banow &f<<"))
            .setViewer(player)
            .setGui(gui)
            .build();

    this.prepareGui();
    window.open();
}

how can i replace a setItems for no dupling

[NichtStudioCode]

What exactly is your question?

[DizzyMontage13]

My question is, how can I add items to 'inv' without duplicating them? The 'addItems' function doesn't work exactly as I want; it adds items every time I open the GUI. I want to add items only once every time someone opens the inventory. The logs have two elements, and when a command adds one to the logs, the logs have three elements. In the GUI, it displays three items every time if the next ones are not added.

[NichtStudioCode]

Just only call Gui#addItems once?
You're also probably looking for PagedGui#setContent.
I'm also not sure why you're using ControlItems here.

Please make sure to read the documentation: https://docs.xen.cx/invui

[DizzyMontage13]

[NichtStudioCode]

Don't use raw types