ting-flexbox" data-expected-width="100">
      <!-- contribution: 100 -->
      <div style="flex: 1 1 200px; width:50px;">
        <div></div>
      </div>
      <!-- contribution: 50 -->
      <div style="flex: 1 1 400px; width:50px;">
      </div>
    </div>
  </div>

  <div class="zero-width">
    <div class="floating-flexbox" data-expected-width="100">
      <!-- contribution: 100px
      starts as max(specified=200, min-content=100) = 200
      clamped down to 50 because doesn't grow
      clamped up t