OTClient how use function findItemTypeByName otclien mehah

[Michcol94]

How to use function to findItemTypeByName ? I use it in every way and it doesn't work, I can't find the item even if I use this code

local itemName = "Z-Sword"
local itemType = g_things.findItemTypeByName(itemName)
  if itemType and itemType:getClientId() ~= 0 then
  print("Items : " .. itemName .. " from Client ID: " .. itemType:getClientId())
  else
print("no find items: " .. itemName)
  end

it always returns else, I don't know why it is always nil, I need the function for this code:

Spoiler: modul

function ShowLootOnScreen()
    local showLootOnScreen = {
        mainScreenTab = {};
        cacheLastTime = { t = 0, i = 1 };
        lootIconOnScreen = {};
        init = function(self)
            self:connectStoreWithElements()
        end;
        terminate = function(self)
            self:disconnectStoreFromElements()
            self:destroy()
        end;
        add = function(self, tab)
            for i = 1, store:getAmountLootOnScreen() do
                self.mainScreenTab[i] = {}
                if i + 1 <= store:getAmountLootOnScreen() then
                    self.mainScreenTab[i] = self.mainScreenTab[i + 1]
                else
                    if tab ~= nil then
                        self.mainScreenTab[i].loot = tab
                        if g_clock.millis() == self.cacheLastTime.t then
                            self.mainScreenTab[i].id = g_clock.millis() * 100 + self.cacheLastTime.i
                            self.cacheLastTime.i = self.cacheLastTime.i + 1
                            -- Delete value after x time
                            self:scheduleDisappear(self.mainScreenTab[i].id)
                        else
                            self.mainScreenTab[i].id = g_clock.millis()
                            self.cacheLastTime.t = g_clock.millis()
                            self.cacheLastTime.i = 1
                            -- Delete value after x time
                            self:scheduleDisappear(self.mainScreenTab[i].id)
                        end
                    else
                        self.mainScreenTab[i] = nil
                    end
                end
            end
            if tab == nil and table.size(self.mainScreenTab) then
                self.mainScreenTab[#self.mainScreenTab] = nil
            end
            self:refresh()
        end;
        scheduleDisappear = function(self, id)
            scheduleEvent(function()
                for a,b in pairs(self.mainScreenTab) do
                    if self.mainScreenTab[a].id == id then
                        self.mainScreenTab[a] = nil
                        self:add(nil)
                        self:refresh()
                        break
                    end
                end
            end, store:getDelayTimeLootOnScreen())
        end;
        refresh = function(self)
            self:destroy()
            local actualX = 0
            local actualY = 0
            if self:getTopMenu():isVisible() then
                actualY = self:getTopMenu():getHeight()
            end
            for a,b in pairs(self.mainScreenTab) do
                if actualY <= self:getMapPanel():getHeight() - 32 then
                    for c,d in pairs(b.loot) do
                        
                        if actualX <= self:getMapPanel():getWidth() - 32 then
                            self.lootIconOnScreen[c..a] = g_ui.createWidget("LootIcon", self:getMapPanel())
                            local findItemByName = g_things.findItemTypeByName(c)
                         
                           
                            if findItemByName:getClientId() ~= 0 then
                                print("Found item with client ID:", findItemByName:getClientId())
                                
                                self.lootIconOnScreen[c .. a]:setItemId(findItemByName:getClientId())
                            else
                                print("Item not found, using default ID")
                                self.lootIconOnScreen[c .. a]:setItemId(3547)
                            end
                            self.lootIconOnScreen[c .. a]:setVirtual(true)
                            self.lootIconOnScreen[c .. a]:setX(actualX + self:getMapPanel():getX())
                            actualX = actualX + 32
                            self.lootIconOnScreen[c .. a]:setY(actualY)
                            if d.count > 1 then
                                self.lootIconOnScreen[c .. a]:setItemCount(d.count)
                            end
                        end
                    end
                end
                actualX = 0
                actualY = actualY + 32
            end
        end;
        destroy = function(self)
            for a,b in pairs(self.lootIconOnScreen) do
                self.lootIconOnScreen[a]:destroy()
                self.lootIconOnScreen[a] = nil
            end
        end;
        getMapPanel = function(self)
            return modules.game_interface.getMapPanel()
        end;
        getTopMenu = function(self)
            return modules.client_topmenu.getTopMenu()
        end;
        -- Connect
        connectStoreWithElements = function(self)
            store.onAddLootLog.showLootOnScreen = function(lootData) self:addLootLog(lootData) end
        end;
        disconnectStoreFromElements = function(self)
            store.onAddLootLog.showLootOnScreen = nil
        end;
        addLootLog = function(self, lootData)
            if store:getShowLootOnScreen() then
                self:add(lootData)
            end
        end;
    }
    return showLootOnScreen
end