anchor.diff:              let ident =
                   name
                   |> Option.map Identifier
  -                |> Option.defaultWith (fun _ -> Helpers.getUniqueIdentifier "arrow")
  +                |> Option.defaultWith (fun _ -> Helpers.getUniqueIdentifier "_arrow")
   
               let func =
                   Statement.functionDef (name = ident, args = args, body = body, returns = returnType)
  
positive.code:                     stmts @ exprAsStatement ctx expr)
              |> transformBody com ctx None
  
          let name = Helpers.getUniqueIdentifier "expr"
  
          let func =
              Statement.functionDef (name = name, args = Arguments.arguments [], body = body)
  
negative.code:         let name =
              name
              |> Option.map (fun name -> com.GetIdentifier(ctx, name))
              |> Option.defaultValue (Helpers.getUniqueIdentifier "_expr")
  
          let func = makeFunction name (args, body, decoratorList, returnType)
  
  