代码记录

$user_list = new Collection();
        foreach ($this->translateSections AS $section)
        {
            $users = $section->translators();
            foreach ($users AS $user)
            {
                if($user && !$user_list->contains($user))
                {
                    $user_list = $user_list->push($user);
                }
            }

        }

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