text: # Copyright (c) Facebook, Inc. and its affiliates.
  #
  # This source code is licensed under the MIT license found in the
  # LICENSE file in the root directory of this source tree.
  
  # fmt: off
  from typing import Sequence
  
  
  class Item:
      def __init__(self, n: int) -> None:
          self.number: int = n
  
  
  class ItemCollector:
      def get_items(self, n: int) -> Sequence[Item]:
          return [Item(i) for i in range(n)]
  
  
  collector = ItemCollector()
  items: Sequence[Item] = collector.get_items(3)
  for item in items:
      item.number
  