anchor.diff:  
   [source,clojure]
   ----
  -(def snap (afterglow.rhythm/metro-snapshot (:metronome sample-show)))
  +(def snap (afterglow.rhythm/metro-snapshot (:metronome *show*)))
   ; -> #'afterglow.examples/snap
   
   snap
  
positive.code: 
  [source,clojure]
  ----
  (afterglow.rhythm/metro-snapshot (:metronome sample-show))
  ; -> #afterglow.rhythm.MetronomeSnapshot{:start 1431727332206, :bpm 120, :bpb 4, :bpp 8,
  ;    :instant 1431727683636, :beat 703, :bar 176, :phrase 22,
  ;    :beat-phase 0.8600000000000136, :bar-phase 0.7150000000000034,
  
negative.code: 
  [source,clojure]
  ----
  (afterglow.rhythm/metro-start (:metronome *show*) 1)
  ; -> 1431727642086
  ----
  
  