100, // start time.
          300 // duration.
      ));
      model.userModel.expectations.push(new tr.model.um.AnimationExpectation(
          model, INITIATOR_TYPE.VIDEO, 300, 100));
      model.userModel.expectations.push(new tr.model.um.ResponseExpectation(
          model, INITIATOR_TYPE.SCROLL, 400, 200));
    });

    const segments = model.userModel.segments;

    const map = getStageToInitiatorToSegmentBounds(model.userModel.segments,
        tr.b.math.Range.fromExplicitRange(150, 350));

    // I