final protected function mandatoryUserOrInlineMessageId(array &$return): array
    {
        if (empty($this->chat_id) && empty($this->message_id)) {
            $return[] = 'inline_message_id';
        }

        // On the other hand, chat_id and message_id are mandatory if inline_message_id is not filled in
        if (empty($this->inline_message_id)) {
            $return[] = 'chat_id';
            $return[] = 'message_id';
        }

        return $return;
    }