anchor.diff:  let generateDefinitionFromPos caretPos src =
       Option.get (tryGenerateDefinitionFromPos caretPos src)
   
  -[<Test; Ignore>]
  +[<Test>]
   let ``go to Tuple<'T1, 'T2> definition`` () =
       let _ = new Tuple<int, int>(1, 2)
  +    // TODO: include open directives so that IStructuralEquatable/... are not wiggled
       // TODO: sort members by display name
       // TODO: sort implemented interfaces
       // TODO: accessibility modifiers
  
positive.code:     member IsEmpty : bool
      member Head : 'T
      member Empty : 'T list
  """
negative.code:     member Item2 : 'T2
  """
  
  [<Test>]
  let ``go to list<'T> definition`` () =
      """open System
  
  