anchor.diff:      static member Of w =
         { Routes=[]
           Models=[]
  +        BasePath=null
  +        Host=null
  +        Schemes=["http"]
           Current=WebPartDocumentation.Of w
           Id=Guid.NewGuid()
           Description=ApiDescription.Empty
  
positive.code:             | _ -> ()
  
          { Definitions=definitions
            BasePath=null; Host=null; Schemes=["http"]
            Paths=paths
            Info=__.Description
            Swagger="2.0" }
  
negative.code:   type DocBuildState =
      { SwaggerJsonPath:string
        SwaggerUiPath:string
        BasePath:string
        Host:string
        Schemes:string list
        Description:ApiDescription
        Routes:WebPartDocumentation list
        Current:WebPartDocumentation
  