anchor.diff:              | Project_Legacy(_) -> "[obsolete]"
   
   type ShowGroupsArgs =
  -    | [<Hidden;NoCommandLine>] PlaceHolder
  -with
  -    interface IArgParserTemplate with
  -        member this.Usage =
  -            match this with
  -            | PlaceHolder -> "Doesn't trace other output than installed packages."
  +    | [<Hidden;NoCommandLine>] NoArgs
  +with
  +    interface IArgParserTemplate with
  +        member __.Usage = ""
   
   type FindPackageVersionsArgs =
       | [<Mandatory;MainCommandAttribute()>] NuGet of package_ID:string
  
positive.code:     interface IArgParserTemplate with
          member this.Usage =
              match this with
              | Flags _ -> "enables or disables auto restore for the repo."
  
  type InstallArgs =
      | [<AltCommandLine("-f")>] Force
  
negative.code:     interface IArgParserTemplate with
          member this.Usage =
              match this with
              | Files _ -> ".nuspec files to fix transitive dependencies within"
              | ReferencesFile _ -> "paket.references to use"
  
  type GenerateNuspecArgs =
      | [<CustomCommandLine "project">][<Mandatory>] Project of project:string
  