"fixedSizeChild" data-expected-width="30" data-expected-height="5" data-offset-x="98" data-offset-y="128"></div></div>
    </div>
    <div class="flexbox" style="align-content: center">
      <div class="a" data-expected-width="10" data-expected-height="10" data-offset-x="68" data-offset-y="140"></div>
      <div class="b" data-expected-width="30" data-expected-height="10" data-offset-x="78" data-offset-y="140"><div class="fixedSizeChild" data-expected-width="30" data-expected-height="5" data-offset-x="78" 