  {stage: 'Response', initiatorType: INITIATOR_TYPE.SCROLL,
          range: [210, 260]},
        {stage: 'Response', initiatorType: INITIATOR_TYPE.SCROLL,
          range: [250, 300]}
    );

    const path = [
      [CHROME_PROCESS_NAMES.BROWSER],
      ['Worker'], ['Response', 'all_initiators']
    ];

    const model = buildModelFromSpec(modelSpec);
    const root = constructMultiDimensionalView(model, model.bounds);
    const values = getNodeValues_(root, path);

    assert.closeTo(getCpuUsage_(values)