Grafika\Imagick\Editor::flip PHP Method

    public function flip(&$image, $mode)
    {
        if ($mode === 'h') {
            $image->getCore()->flopImage();
        } else {
            if ($mode === 'v') {
                $image->getCore()->flipImage();
            } else {
                throw new \Exception(sprintf('Unsupported mode "%s"', $mode));
            }
        }
        return $this;
    }