input: Write a function to sort the list items in descending order. The function should modify the list in place and return None.
  def sort_descending(list_items):
      list_items.sort(reverse=True)
  
  assert sort_descending([3, 7, 5, 8, 10]) == None
  assert sort_descending([1, 2, 3, 4, 5]) == None
  assert sort_descending([10, 9, 8, 7, 6]) == None
  assert sort_descending([]) == None
  assert sort_descending([5, 4, 3, 2, 1]) == None
output: def sort_descending(list_items):
      list_items.sort(reverse=True)