code: protected function getTasks()
      {
          $tasks = [];
          $tasks['flush-file-cache'] = [];
          $tasks['flush-file-cache']['title'] = 'Flush File Cache';
          $tasks['flush-file-cache']['description'] = 'Clear the file cache in Cascade';
          $tasks['flush-file-cache']['run'] = function () {
              Yii::$app->fileCache->flush();
              Yii::$app->response->content = 'File cache was flushed!';
              Yii::$app->response->taskOptions = ['state' => 'success', 'title' => 'Success'];
          };
  
          $tasks['flush-cache'] = [];
          $tasks['flush-cache']['title'] = 'Flush Memory Cache';
          $tasks['flush-cache']['description'] = 'Clear the memory cache in Cascade';
          $tasks['flush-cache']['run'] = function () {
              Yii::$app->cache->flush();
              Yii::$app->response->content = 'Memory cache was flushed!';
              Yii::$app->response->taskOptions = ['state' => 'success', 'title' => 'Success'];
          };
  
          return $tasks;
      }
docs: Get tasks.
  
  @return [[@doctodo return_type:getTasks]] [[@doctodo return_description:getTasks]]