code: function shouldCompute(cues) {
        for (var i = 0; i < cues.length; i++) {
          if (cues[i].hasBeenReset || !cues[i].displayState) {
            return true;
          }
        }
        return false;
      }
docs: Determine if we need to compute the display states of the cues. This could be the case if a cue's state has been changed since the last computation or if it has not been computed yet.