Airship\Cabin\Bridge\Blueprint\Permissions::flattenMultiContextList PHP Method

    protected function flattenMultiContextList(array $return, array $contexts, array $actions = []) : array
    {
        $list = [];
        foreach ($contexts as $c) {
            if (empty($list)) {
                $list = $return[$c];
                continue;
            }
            $list = $this->flattenContextList($list, $return[$c], $actions);
        }
        return $list;
    }