anchor.diff:  open OptimizedClosures
   open ExtCore
   
  -(*
   
   //
   type QueueData<'T> = {
  -    Front : Stream<'T>;
  +    Front : LazyList<'T>;
       Rear : 'T list;
  -    Pending : Stream<'T>;
  +    Pending : LazyList<'T>;
   }
   
   //
  
positive.code: ﻿(*
  
  Copyright ____ Chris Okasaki
  Copyright 2013 Jack Pappas
  
  Licensed under the Apache License, Version 2.0 (the "License");
  
negative.code: 
              result.ToArray ()
  
  