Craft\ImagerService::postOptimize PHP Method

    public function postOptimize($type, $file)
    {
        if ($this->getSetting('optimizeType') == 'task') {
            switch ($type) {
                case 'jpegoptim':
                    $this->makeTask('Imager_Jpegoptim', $file);
                    break;
                case 'jpegtran':
                    $this->makeTask('Imager_Jpegtran', $file);
                    break;
                case 'mozjpeg':
                    $this->makeTask('Imager_Mozjpeg', $file);
                    break;
                case 'optipng':
                    $this->makeTask('Imager_Optipng', $file);
                    break;
                case 'tinypng':
                    $this->makeTask('Imager_TinyPng', $file);
                    break;
            }
        } else {
            switch ($type) {
                case 'jpegoptim':
                    $this->runJpegoptim($file);
                    break;
                case 'jpegtran':
                    $this->runJpegtran($file);
                    break;
                case 'mozjpeg':
                    $this->runMozjpeg($file);
                    break;
                case 'optipng':
                    $this->runOptipng($file);
                    break;
                case 'tinypng':
                    $this->runTinyPng($file);
                    break;
            }
        }
    }