                             max-height: 10px" data-expected-width="30" data-expected-height="10">
    </div>
    <div class="flexbox">
      <img src="support/solidblue.png" style="max-width: 10px;
                                              min-height: 30px" data-expected-width="10" data-expected-height="40">
    </div>
    <br>

    <!-- Row 6: min|max main-size vs. explicit cross-size, & vice versa -->
    <div class="flexbox">
      <img src="support/solidblue.png" style="min-width: 30px;
           