code: def folder_get_info(self, folder_key=None, device_id=None, details=None):
          
          return self.request('folder/get_info', QueryParams({
              'folder_key': folder_key,
              'device_id': device_id,
              'details': details
          }))
docs: folder/get_info
  
          http://www.mediafire.com/developers/core_api/1.3/folder/#get_info