code: def resume(self):
          
          with self.readSharedFileStream('config.pickle') as fileHandle:
              config = safeUnpickleFromStream(fileHandle)
              assert config.workflowID is not None
              self.__config = config
docs: Connect this instance to the physical storage it represents and load the Toil configuration
          into the :attr:`AbstractJobStore.config` attribute.
  
          :raises NoSuchJobStoreException: if the physical storage for this job store doesn't exist