anchor.diff:          if par = null then None else Some((elementValue addStyle par).ToString())
   
   module TooltipXmlDoc =
  -    let rawGenerator = new Monodoc.Generators.RawGenerator()
       ///lru based memoize
       let private memoize f n =
           let lru = ref (ExtCore.Caching.LruCache.create n)
  
positive.code: namespace MonoDevelop.FSharp
  open System
  open System.IO
  
negative.code:       let helpTree = MonoDevelop.Projects.HelpService.HelpTree
        if helpTree = null then None else
        try
  
            let helpxml = helpTree.GetHelpXml(key)
            if helpxml = null then None else Some(helpxml)
        with ex ->
            LoggingService.LogError ("GetHelpXml failed for key {0}", key, ex)
            None
  