docs: def _page(q, chunk=1000):
      """ Quick utility to page a query, 1000 items at a time.
      We need this so we don't OOM (out of memory) ourselves loading the world.
      """
  
      offset = 0
      while True:
          r = False
          for elem in q.limit(chunk).offset(offset):
              r = True
              yield elem
          offset += chunk
          if not r:
              break