          super(HyperlinkedModelSerializerOptions, self).__init__(meta)
          self.view_name = getattr(meta, 'view_name', None)
          self.lookup_field = getattr(meta, 'lookup_field', None)
  
  
  class HyperlinkedModelSerializer(ModelSerializer):
      """
 
</s> remove             ret['url'] = url_field
 </s> add             ret[self.opts.url_field_name] = url_field </s> remove         if 'url' not in fields:
 </s> add         if self.opts.url_field_name not in fields: </s> remove             return data.get('url', None)
 </s> add             return data.get(self.opts.url_field_name, None)
        self.url_field_name = getattr(meta, 'url_field_name', 'url')
          super(HyperlinkedModelSerializerOptions, self).__init__(meta)
          self.view_name = getattr(meta, 'view_name', None)
          self.lookup_field = getattr(meta, 'lookup_field', None)
        self.url_field_name = getattr(meta, 'url_field_name', 'url')
  
  
  class HyperlinkedModelSerializer(ModelSerializer):
      """
keep keep add keep keep keep keep
 Make HyperlinkedModelSerializer `url` field name customizable 
rest_framework/serializers.py