public function toOptionArray()
    {
        $visibilities
            = $this->productVisibility->getAllOptions();
        $options[] = [
            'label' => __('---- Default Option ----'),
            'value' => '0',
        ];
        foreach ($visibilities as $visibility) {
            $options[] = [
                'label' => $visibility['label'],
                'value' => $visibility['value'],
            ];
        }
        return $options;
    }