Craft\ImageResizer_CropService::_cropWithPath PHP Method

    private function _cropWithPath($path, $x1, $x2, $y1, $y2)
    {
        try {
            $image = craft()->images->loadImage($path);
            $filename = basename($path);
            // Make sure that image quality isn't messed with for cropping
            $image->setQuality(craft()->imageResizer->getImageQuality($filename, 100));
            // Do the cropping
            $image->crop($x1, $x2, $y1, $y2);
            $image->saveAs($path);
            return true;
        } catch (\Exception $e) {
            ImageResizerPlugin::log($e->getMessage(), LogLevel::Error, true);
            return false;
        }
    }