anchor.diff:  | Domain model to use with
   
   | *controller*
  -| Controller name to handle requests (if not set `annexable` will bu used)
  +| Controller name to handle requests (if not set `annexable` will be used)
   
   | *name*
  -| Name of HTML element (if not set `annex` will bu used)
  +| Name of HTML element (if not set `annex` will be used)
   
   | *bucket*
  -| Name of bucket (if not set `common` will bu used)
  +| Name of bucket (if not set `common` will be used)
   
   |===
   
  
positive.code: | Id of existing Annex object
  
  | *controller*
  | Controller name to handle requests (if not set `annexable` will bu used)
  
  | *iframeId*
  | Id property of HTML iFrame element (must be set and exists)
  
negative.code:    ....
  }
  ----
  or implement Annexable interface:
  [source,groovy]
  .`Book.groovy`
  ----
  