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<!DOCTYPE html>
<link rel="author" title="Morten Stenshorne" href="mailto:mstensho@chromium.org">
<!-- Only the first fragmentainer actually has room for repeated headers and
footers. We should still fit 1px of unrepeated content in every
fragmentainer, because that should be a sensible way of interpretating
assumed to have a minimum block size of 1px"). -->
<div style="margin:100px; columns:4; column-fill:auto; height:20px; background:yellow;">
<div style="margin-bottom:-60px;"></div>
<div style="columns:1; column-fill:auto; background:lime;">
<div style="display:table;">
<div style="display:table-header-group; break-inside:avoid;">
<div style="width:20px; height:20px; background:blue;"></div>
</div>
<div style="display:table-footer-group; break-inside:avoid;">
<div style="width:20px; height:20px; background:hotpink;"></div>
</div>
<div style="height:100px; background:black;"></div>
</div>
</div>
</div>