case BackpackGUI:
equipped = getBackpackItem(player);
if (equipped == null)
return null;
return new GuiBackpack(new ContainerBackpack(player, new ItemInventory(ItemBackpack.class, Defaults.SLOTS_BACKPACK_DEFAULT, equipped)));
case BackpackT2GUI:
equipped = getBackpackItem(player);
if (equipped == null)
return null;
return new GuiBackpackT2(new ContainerBackpack(player, new ItemInventory(ItemBackpack.class, Defaults.SLOTS_BACKPACK_T2, equipped)));
case LepidopteristBackpackGUI:
equipped = getBackpackItem(player);
if (equipped == null)
return null;