anchor.diff:  ** Panel definitions
   ** Part definitions
   
  -TODO
  -
   UberFire Metadata Concepts
   ~~~~~~~~~~~~~~~~~~~~~~~~~~
   
  
positive.code: * UberFire Servlet
  ** App template, header template, footer template, user data template
  * FileUpload Servlet
  * FileDownload Servlet
  TODO
  
  UberFire Widgets Concepts
  ~~~~~~~~~~~~~~~~~~~~~~~~~
  
negative.code: 
  The `uberfire-widgets-properties-editor` module introduces the following concepts:
  
  * Properties Editor Widget
  +
  TODO
  * PropertyEditorCategory
  