Navigation in groups with translated labels

Hi folks,
I am struggling a bit on rebuilding my old v2-Frontend in v3. Right now I am trying to recreate the old navigation-structure which had been build using a NavigationBuilder. Here is the old code:

NavigationGroup::make(m__('navigation.articlemanagement'))->items([
...ArticleResource::getNavigationItems(),
...InvalidArticleResource::getNavigationItems(),
...StockproblemResource::getNavigationItems(),
NavigationGroup::make(m__('general.terms.tools'))->items([
NavigationItem::make(m__('articlemanagement.tools.batchtracing.navigationlabel'))
->icon('blossom-icons.articles.tools.batchtracing')
 ->url(Articleselection::getUrl())
->isActiveWhen(fn() => str_contains(request()->route()->getName(), 'batchtracing')),
...WarehousemanagementResource::getNavigationItems(),
])->collapsible(false),
])->collapsible(false),

NavigationGroup::make(m__('navigation.articlemanagement'))->items([
...ArticleResource::getNavigationItems(),
...InvalidArticleResource::getNavigationItems(),
...StockproblemResource::getNavigationItems(),
NavigationGroup::make(m__('general.terms.tools'))->items([
NavigationItem::make(m__('articlemanagement.tools.batchtracing.navigationlabel'))
->icon('blossom-icons.articles.tools.batchtracing')
 ->url(Articleselection::getUrl())
->isActiveWhen(fn() => str_contains(request()->route()->getName(), 'batchtracing')),
...WarehousemanagementResource::getNavigationItems(),
])->collapsible(false),
])->collapsible(false),

Important note:

m__

m__

is my custom translation-function.
I am trying to follow the docs at https://filamentphp.com/docs/3.x/panels/navigation#grouping-navigation-items-under-other-items and came up with this so far in the PanelServiceProvider:

NavigationGroup::make()
->label(fn() => m__('navigation.articlemanagement'))

NavigationGroup::make()
->label(fn() => m__('navigation.articlemanagement'))

Now I am trying to add the

WarehousemanagementResource

WarehousemanagementResource

and added this code to it:

public static function getNavigationParentItem(): ?string
    {
        return m__('navigation.articlemanagement');
    }

    public static function getNavigationGroup(): ?string
    {
        return m__('general.terms.tools');
    }

public static function getNavigationParentItem(): ?string
    {
        return m__('navigation.articlemanagement');
    }

    public static function getNavigationGroup(): ?string
    {
        return m__('general.terms.tools');
    }

But this always leaves me with an error

Call to a member function keyBy() on null

Call to a member function keyBy() on null

. I need to recreate the structure in the attached screenshot and I am confused that NavigationGroups are identified by their labels? How does that work with translations?
Could someone please help me in this and tell me what's the best practice with the desired outcome please?

Navigation - Panel Builder - Filament

Navigation in groups with translated labels

NavigationGroup::make(m__('navigation.articlemanagement'))->items([
...ArticleResource::getNavigationItems(),
...InvalidArticleResource::getNavigationItems(),
...StockproblemResource::getNavigationItems(),
NavigationGroup::make(m__('general.terms.tools'))->items([
NavigationItem::make(m__('articlemanagement.tools.batchtracing.navigationlabel'))
->icon('blossom-icons.articles.tools.batchtracing')
 ->url(Articleselection::getUrl())
->isActiveWhen(fn() => str_contains(request()->route()->getName(), 'batchtracing')),
...WarehousemanagementResource::getNavigationItems(),
])->collapsible(false),
])->collapsible(false),

NavigationGroup::make(m__('navigation.articlemanagement'))->items([
...ArticleResource::getNavigationItems(),
...InvalidArticleResource::getNavigationItems(),
...StockproblemResource::getNavigationItems(),
NavigationGroup::make(m__('general.terms.tools'))->items([
NavigationItem::make(m__('articlemanagement.tools.batchtracing.navigationlabel'))
->icon('blossom-icons.articles.tools.batchtracing')
 ->url(Articleselection::getUrl())
->isActiveWhen(fn() => str_contains(request()->route()->getName(), 'batchtracing')),
...WarehousemanagementResource::getNavigationItems(),
])->collapsible(false),
])->collapsible(false),

Important note:

m__

m__

NavigationGroup::make()
->label(fn() => m__('navigation.articlemanagement'))

NavigationGroup::make()
->label(fn() => m__('navigation.articlemanagement'))

Now I am trying to add the

WarehousemanagementResource

WarehousemanagementResource

and added this code to it:

public static function getNavigationParentItem(): ?string
    {
        return m__('navigation.articlemanagement');
    }

    public static function getNavigationGroup(): ?string
    {
        return m__('general.terms.tools');
    }

public static function getNavigationParentItem(): ?string
    {
        return m__('navigation.articlemanagement');
    }

    public static function getNavigationGroup(): ?string
    {
        return m__('general.terms.tools');
    }

But this always leaves me with an error

Call to a member function keyBy() on null

Call to a member function keyBy() on null

Navigation - Panel Builder - Filament

Navigation in groups with translated labels

Navigation in groups with translated labels

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