anchor.diff:      abstract TargetFramework: FSharpTargetFramework
       abstract CompilerOptions: string []
       abstract SourceFiles: string []
  +    abstract OutputPath: string
       abstract GetReferencedProjects: unit -> IProjectProvider list
       abstract GetAllReferencedProjectFileNames: unit -> string list
       abstract GetProjectCheckerOptions: LanguageService -> Async<ProjectOptions>
  
positive.code:             member x.TargetFramework = targetFramework
              member x.CompilerOptions = [| "--noframework"; "--debug-"; "--optimize-"; "--tailcalls-" |]
              member x.SourceFiles = [| filePath |]
              member x.GetReferencedProjects() = []
              member x.GetAllReferencedProjectFileNames() = []
              member x.GetProjectCheckerOptions languageService =
  
negative.code:             member x.TargetFramework = targetFramework()
              member x.CompilerOptions = compilerOptions()
              member x.SourceFiles = sourceFiles()
              member x.OutputPath = getActiveConfigProperty "OutputPath"
              
              member x.GetReferencedProjects() =
                  project.GetReferencedFSharpProjects()
  