# File lib/fog/rackspace/requests/auto_scale/update_group_config.rb, line 18
        def update_group_config(group_id, options)
          group = self.data[:autoscale_groups][group_id]
          if group.nil?
            raise Fog::Rackspace::AutoScale::NotFound
          end

          config = group['groupConfiguration']

          config['name'] = options['name'] if options['name']
          config['cooldown'] = options['cooldown'] if options['cooldown']
          config['minEntities'] = options['minEntities'] if options['minEntities']
          config['maxEntities'] = options['maxEntities'] if options['maxEntities']
          config['metadata'] = options['metadata'] if options['metadata']

          request(:body => config)
        end