new_contents: # -*- coding: utf-8 -*-
  #
  # Copyright (c) 2017 F5 Networks Inc.
  # GNU General Public License v3.0 (see COPYING or https://www.gnu.org/licenses/gpl-3.0.txt)
  
  from __future__ import absolute_import, division, print_function
  __metaclass__ = type
  
  
  def cmp_simple_list(want, have):
      if want is None:
          return None
      if have is None and want == '':
          return None
      if have is not None and want == '':
          return []
      if have is None:
          return want
      if set(want) != set(have):
          return want
      return None
  
subject: add module_utils for shared comparison functions