Pimcore\Image\Adapter\Imagick::mirror PHP Method

    public function mirror($mode)
    {
        $this->preModify();
        if ($mode == "vertical") {
            $this->resource->flipImage();
        } elseif ($mode == "horizontal") {
            $this->resource->flopImage();
        }
        $this->postModify();
        return $this;
    }