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Test Info:

<!DOCTYPE html>
<style>
div {
column-count: 3;
column-gap: 8px;
column-rule: thick solid red;
visibility: hidden;
width: 300px;
background-color: #fcc;
}
span {
visibility: visible;
}
</style>
<div>
<span>This is some content that is still shown within the columns.</span>
</div>