public function createImageFromString($string, $adapter = null)
 {
     if (empty($adapter)) {
         $adapter = $this->defaults['default_adapter'];
     }
     $image = new Image($adapter);
     $mime = $this->autoDetectMIMETypeFromFile($filename);
     $image->setFilename($this->defaults['default_image']['filename']);
     return $image->loadString($string);
 }