laravel-notification-channels / hipchat

     * @param CardAttribute|Closure $attribute

     * @return $this

     */

    public function addAttribute($attribute)

    {

        if ($attribute instanceof CardAttribute) {

            $this->attributes[] = $attribute;

            return $this;

        }

        if ($attribute instanceof Closure) {

            $attribute($new = new CardAttribute());

            $this->attributes[] = $new;

            return $this;

        }

        throw new InvalidArgumentException(

            'Invalid attribute type. Expected '.CardAttribute::class.' or '. Closure::class.'.'

        );

    }

     * @param Card|Closure|null $card

     * @return $this

     */

    public function card($card)

    {

        if ($card instanceof Card) {

            $this->card = $card;

            return $this;

        }

        if ($card instanceof Closure) {

            $card($new = new Card());

            $this->card = $new;

            return $this;

        }

        throw new InvalidArgumentException(

            'Invalid Card type. Expected '.Card::class.' or '. Closure::class.'.'

        );

    }