code: def _collection(self):
          
          old_sort_limits_and_len_mode = None if self._sort_limits is None else self._sort_limits.copy(), self._len_mode
          old_sorts = None if self._sort is None else self._sort.copy(),\
                      None if self._sort_by_sortedset is None else self._sort_by_sortedset.copy()
          try:
              if self.stored_key and not self._stored_len:
                  if self._len_mode:
                      self._len = 0
                      self._len_mode = False
                  self._sort_limits = {}
                  return []
  
              # Manage sort desc added by original `__getitem__` when we sort by score
              if self._sort_by_sortedset and self._sort and self._sort.get('desc'):
                  self._sort = None
                  self._sort_by_sortedset['desc'] = not self._sort_by_sortedset.get('desc', False)
  
              return super(ExtendedCollectionManager, self)._collection
          finally:
              self._sort_limits, self._len_mode = old_sort_limits_and_len_mode
              self._sort, self._sort_by_sortedset = old_sorts
docs: Effectively retrieve data according to lazy_collection.
          If we have a stored collection, without any result, return an empty list