Themes
    id - integer
    composer_package - string
    name - string

Plugins
    id - integer
    composer_package - string
    name - string


Products
    id - integer
    name - string
    ...
    productable_id - integer
    productable_type - string

public function store(Request $request)
 {
    $selectedTheme = null;
    foreach($request->input('theme') as $key => $value) {
        if($value === 'selected') {
            $selectedTheme = $key;
        }
    }

    $theme = Product::find($selectedTheme);



    foreach($this->predefinedArray as $value) {
        $request->session()->put('chosen_theme.' . $value, $theme->$value);
    }


    $data = $request->session()->all();

    return redirect('plugins');
}

public function productable()
{
    return $this->morphTo();
}


public function order_items()
{
    return $this->hasMany(Orderitems::class);
}

public function webshops()
{
    return $this->hasMany(Webshop::class);
}


public function products()
{
   return $this->morphMany(Product::class, 'productable');
}