public function image($large, $small = null)
    {
        $this->image = [
            'smallImageUrl' => $small ?? $large,
            'largeImageUrl' => $large,
        ];

        return $this;
    }
public function image($large, $small = null)
    {
        $this->image = [
            'smallImageUrl' => $small ?? $large,
            'largeImageUrl' => $large,
        ];

        return $this;
    }
public function image ( $ large , $ small = null ) { $ this -> image = [ 'smallImageUrl' => $ small ?? $ large , 'largeImageUrl' => $ large , ] ; return $ this ; }
Set the card image.

@param $large
@param null $small
@return $this
Set the card image .