anchor.diff:      param.PluginDirectories |> Seq.iter rtSetup.AddPluginDirectory
       rtSetup
   
  -let Run (setParam: GallioParams -> GallioParams) =
  +let Run (setParam: GallioParams -> GallioParams) assemblies =
       let param = setParam GallioDefaults
       let package = createPackage param
       let project = createProject param package
  
positive.code:       /// extensions to use during the test run.
        /// The value must be in the form '[Namespace.]Type,Assembly[;Parameters]'
        RunnerExtensions: string list // use type + parameters instead of descriptor as string?
        Assemblies: string seq
        HintDirectories: string seq
        PluginDirectories: string seq 
        ApplicationBaseDirectory: DirectoryInfo
  
negative.code:                     TestExplorationOptions = addProperties param.TestExplorationOptions (TestExplorationOptions()),
                      TestRunnerOptions = addProperties param.TestRunnerOptions (TestRunnerOptions())
                     )
      assemblies |> Seq.iter launcher.AddFilePattern
  
      let result = launcher.Run()
      log result.ResultSummary
  