Spec.processes[0].threads[0].slices.push(
        {range: [150, 200], cpu: 30},
        {range: [205, 255], cpu: 20}
    );
    simpleModelSpec.expectations.push(
        {stage: 'Animation', initiatorType: INITIATOR_TYPE.CSS,
          range: [100, 190]},
        {stage: 'Animation', initiatorType: INITIATOR_TYPE.VIDEO,
          range: [160, 230]}
    );
    const path = [
      [CHROME_PROCESS_NAMES.BROWSER],
      ['CrBrowserMain'], ['Animation', 'all_initiators']
    ];

    const model = buildModelFro