  def make_immutable_fields_list(name, data):
      return ImmutableList(data, warning=IMMUTABLE_WARNING % name)
  
  
  @python_2_unicode_compatible
  class Options(object):
      FORWARD_PROPERTIES = {
          'fields', 'many_to_many', 'concrete_fields', 'local_concrete_fields',
          '_forward_fields_map', 'managers', 'managers_map', 'base_manager',
          'default_manager',
 
</s> remove @python_2_unicode_compatible
 </s> add  </s> remove @python_2_unicode_compatible
 </s> add  </s> remove @python_2_unicode_compatible
 </s> add  </s> remove @python_2_unicode_compatible
 </s> add  </s> remove @python_2_unicode_compatible
 </s> add 
  def make_immutable_fields_list(name, data):
      return ImmutableList(data, warning=IMMUTABLE_WARNING % name)
  
  

  class Options(object):
      FORWARD_PROPERTIES = {
          'fields', 'many_to_many', 'concrete_fields', 'local_concrete_fields',
          '_forward_fields_map', 'managers', 'managers_map', 'base_manager',
          'default_manager',
keep keep keep keep replace keep keep keep keep keep
 Refs #23919 -- Removed python_2_unicode_compatible decorator usage 
django/db/models/options.py