anchor.diff:  Once you set this new version, the session cookie on the client side will be invalidated and
   the user gets a new session cookie with the current version.
   
  -[WARN]
  +WARN:
   Be very careful with this feature, as it directly effects the user experience of your users.
   
   == Flash
  
positive.code: 2. Controller filters
  3. Method filters
  
  [NOTE]
  Only the header and content values are merged with the response object returned from your controller.
  
  Here is an example of the AuthenticityFilter which is used for the CSRF checks.
  
negative.code: This will start mangoo I/O in production mode, using the default
  configuration from your application.yaml
  
  NOTE:
  Also Undertow is production-ready, it is recommended to use a front-end HTTP
  server such as nginx or Apache to leverage an easy configuration for
  load-balancing, SSL termination, etc.
  