docs: function(sortedInputEvents) {
        var animationEvents = this.modelHelper.browserHelper.
            getAllAsyncSlicesMatching(function(event) {
              return ((event.title === CSS_ANIMATION_TITLE) &&
                      (event.duration > 0));
        });
  
        var animationRanges = [];
        animationEvents.forEach(function(event) {
          animationRanges.push({
            min: event.start,
            max: event.end,
            event: event
          });
        });
  
        function merge(ranges) {
          var protoIR = new ProtoIR(ProtoIR.ANIMATION_TYPE, CSS_IR_NAME);
          ranges.forEach(function(range) {
            protoIR.pushEvent(range.event);
          });
          return protoIR;
        }
  
        return tr.b.mergeRanges(animationRanges,
                                ANIMATION_MERGE_THRESHOLD_MS,
                                merge);
      }