anchor.diff:  
   // Example files can be found in the packages "Microsoft.NETCore.Platforms 1.1.0" and "Microsoft.NETCore.Targets 1.1.0"
   
  +/// The runtime identifiert for a specific runtime. Should be treated as a black box in combination with the operations defined on the RuntimeGraph
   type Rid =
       private { Rid : string }
       static member Of s = { Rid = s }
  
positive.code:             | _ -> failwithf "This should never happen")
          |> Map.ofSeq
  
  module RuntimeGraph =
      open PackageResolver
  
  
negative.code: open Newtonsoft.Json
  open Newtonsoft.Json.Linq
  
  /// A module for parsing runtime.json files contained in various packages.
  module RuntimeGraphParser =
      open System.Collections.Generic
  
  