anchor.diff:  type StringKeyUnion = | D of Prop : int
   
   [<Fact>]
  -let ``string key DU`` () =
  +let ``string key`` () =
   
     let input = D 1
     let actual = convert input
  
positive.code:   | C of int64 * float32
  
  [<Fact>]
  let ``simple DU`` () =
  
    let input = A
    let actual = convert input
  
negative.code:   | G of Prop2 : int64 * Prop3: float32
  
  [<Fact>]
  let ``struct `` () =
  
    let input = E
    let actual = convert input
  