Twig/CropTwigExtension.php
protected function makeCropName(UploadableFile $file, $coordinates)
    {
        $ext    = $file->getExtension();
        $suffix = implode('_', $coordinates);

        return preg_replace('/\.'. $ext .'$/ui', '_crop_'. $suffix .'.'. $ext, $file->getWebPath());
    }
protected function makeCropName(UploadableFile $file, $coordinates)
    {
        $ext    = $file->getExtension();
        $suffix = implode('_', $coordinates);

        return preg_replace('/\.'. $ext .'$/ui', '_crop_'. $suffix .'.'. $ext, $file->getWebPath());
    }
Returns the name for a cropped file

@param UploadableFile $file
@param $coordinates
@return mixed