public function deleteCache(Model $Model, $key = null)
 {
     $this->_configure($Model);
     App::uses('ClearCache', 'ClearCache.Lib');
     $ClearCache = new ClearCache();
     if ($key) {
         return Cache::delete($key, 'cacheable' . $Model->alias);
     } else {
         return $ClearCache->files($this->_settings[$Model->alias]['folder'] . DS . $Model->alias);
     }
 }
 public function deleteCache(&$model, $key = null)
 {
     App::import('Libs', 'ClearCache.ClearCache');
     $ClearCache = new ClearCache();
     if ($key) {
         return Cache::delete($model, $key, 'cacheable');
     } else {
         return $ClearCache->files('cacheable' . DS . $model->alias);
     }
 }