# File lib/fog/rackspace/requests/auto_scale/update_launch_config.rb, line 5
        def update_launch_config(group_id, options)
          body = options

          request(
            :expects => [204],
            :method => 'PUT',
            :path => "groups/#{group_id}/launch",
            :body => Fog::JSON.encode(body)
          )
        end