[xwiki-users] macro content body

Hi, I'm writing a macro as described on 'Writing XWiki Rendering Macros in wiki pages' I've create a object of class WikiMacroClass I fail to understand what is meant by the two attributes: Macro Content Type; No Content, Optional or Mandatory and Content Description. This is what's in the manual: • Macro content type: Whether this macro should support a body or not • Content description: A short description about the macro's content to be displayed on the WYSIWYG editor What is a body, can somebody give a example? Maybe good to extend the manual also with such a example? thxs Gerritjan