GuiBuilder

player.openGui {
    title = "設定メニュー"
    rows = 3

    structure {
        +"# # # # # # # # #"
        +"# A . B . C . D #"
        +"# # # # # # # # #"
    }

    decoration('#', Material.BLACK_STAINED_GLASS_PANE)

    item('A') {
        material = Material.DIAMOND_SWORD
        displayName = "戦闘設定"
        onClick { action ->
            GuiResult.Success(Unit)
        }
    }
}