anchor.diff:    and Contact =
       { Name:string; Url:string; Email:string }
       static member Empty = 
  -      { Name=""; Url=""; Email="" }
  +      { Name=""; Url=""; Email=null }
     and LicenseInfos =
       { Name:string; Url:string }
       static member Empty = 
  
positive.code:       Paths:IDictionary<Path,IDictionary<HttpVerb,PathDefinition>>
        Definitions:IDictionary<string,ObjectDefinition> }
      member __.ToJson() =
        let settings = new JsonSerializerSettings()
        settings.ContractResolver <- new CamelCasePropertyNamesContractResolver()
        settings.Converters.Add(new ResponseDocConverter())
        settings.Converters.Add(new PropertyDefinitionConverter())
  
negative.code:             | _ -> ()
  
          { Definitions=definitions
            BasePath=null; Host=null; Schemes=["http"]
            Paths=paths
            Info=__.Description
            Swagger="2.0" }
  