anchor.diff:                  JsonConvert.DeserializeObject<'T>(json, settings)
   
               member __.DeserializeAsync<'T> (stream : Stream) = task {
  -                let memoryStream = new MemoryStream()
  +                use memoryStream = new MemoryStream()
                   do! stream.CopyToAsync(memoryStream)
                   memoryStream.Seek(0L, SeekOrigin.Begin) |> ignore
  -                let streamReader = new StreamReader(memoryStream)
  -                let jsonTextReader = new JsonTextReader(streamReader)
  +                use streamReader = new StreamReader(memoryStream)
  +                use jsonTextReader = new JsonTextReader(streamReader)
                   return serializer.Deserialize<'T>(jsonTextReader)
               }
   // ---------------------------
  
positive.code:     open System.Threading.Tasks
      open Newtonsoft.Json
      open Newtonsoft.Json.Serialization
      open Utf8Json
  
      /// **Description**
  
negative.code: namespace Giraffe.Serialization
  
  // ---------------------------
  // JSON
  