public function content()
    {
        $arguments = func_get_args();
        $count = count($arguments);

        if ($count > 0) {
            $this->setText($arguments[0]);
        }

        if ($count > 1) {
            if (is_bool($arguments[1])) {
                $this->setMarkdown($arguments[1]);

                if ($count > 2) {
                    $this->setNotification($arguments[2]);
                }
            } else {
                call_user_func_array([$this, 'addAttachment'], array_slice($arguments, 1));
            }
        }

        return $this;
    }