t is indefinite, so row gaps should be based on grid's 'auto' height. Column gaps based on a grid's 'auto' width, which will reduce the available space for tracks; however, they can grow exceeding their content's max-width.</p>
<div class="width400">
    <div class="grid columnGap10Percent rowGap20Percent" data-expected-width="400" data-expected-height="20">
        <div class="firstRowFirstColumn"   data-offset-x="0"   data-offset-y="0"  data-expected-width="180" data-expected-height="10">XXX X XX X</div>
