text: """Import libraries."""
  from typing import Union, Any
  
  
  class Item:
      """
      Item.
  
      An item on a cell can be pick up by the player.
      So, it will be remove from the cell
      and place in player backpack.
      """
  
      def __init__(self, name: str, case):
          """
          Define name and case.
  
          :param name:
          :param case:
          """
          self.name: str = name
          self.case: Union[Any, None] = case
  
      def pick_up(self):
          """Pick up the item and remove it from the cell."""
          self.case.remove_item()
  