public function getThemeRegionConfig($theme)
    {
        $regions = variable_get('ucms_layout_regions_' . $theme, []);

        if (null === $regions) {
            $regions = array_keys(system_region_list($theme));
            $regions = array_fill_keys($regions, self::CONTEXT_PAGE);
        }

        return array_map('intval', $regions);
    }