anchor.diff:      let getRenderDescriptors world : RenderDescriptor rQueue =
           let componentDescriptors = getComponentRenderDescriptors world
           let worldDescriptors = getWorldRenderDescriptors world
  -        worldDescriptors @ componentDescriptors // NOTE: pretty inefficient
  +        componentDescriptors @ worldDescriptors // NOTE: pretty inefficient
   
       /// Render the world.
       let render world =
  
positive.code: 
      let updateTransition1 transitionModel_ =
          let transition_ = get transitionModel_ transitionLens
          let (transition_, finished) =
              if transition_.Ticks >= transition_.Lifetime then ({ transition_ with Ticks = 0 }, true)
              else ({ transition_ with Ticks = transition_.Ticks + 1 }, false)
          let transitionModel_ = set transition_ transitionModel_ transitionLens
          (transitionModel_, finished)
  
      let updateTransition update world_ : bool * World =
          let (keepRunning, world_) =
  
negative.code:     let getAudioDescriptors world : AudioDescriptor rQueue =
          let componentDescriptors = getComponentAudioDescriptors world
          let worldDescriptors = [] // TODO: get audio descriptors when there are some
          componentDescriptors @ worldDescriptors // NOTE: pretty inefficient
  
      /// Play the world's audio.
      let play world_ =
  