code: def loadMoreItems(self, excludeRead=False, continuation=None, loadLimit=20, since=None, until=None):
          
          self.lastLoadOk     = False
          self.lastLoadLength = 0
          if not continuation and not self.continuation:
              return
          self._itemsLoadedDone(self._getContent(excludeRead, continuation or self.continuation, loadLimit, since, until))
docs: Load more items using the continuation parameters of previously loaded items.