public function canEditAuthors($member = null)
    {
        $member = $this->getMember($member);

        $extended = $this->extendedCan('canEditAuthors', $member);

        if ($extended !== null) {
            return $extended;
        }

        $parent = $this->Parent();

        if ($parent instanceof Blog && $parent->exists()) {
            if ($parent->isEditor($member)) {
                return true;
            }

            if ($parent->isWriter($member) && $this->isAuthor($member)) {
                return true;
            }
        }

        return Permission::checkMember($member, Blog::MANAGE_USERS);
    }