lumn mixin</p></div><h3 class="item__sub-heading">Parameters</h3><table class="item__parameters"><thead><tr><th scope="col"><span class="visually-hidden">parameter</span>Name</th><th scope="col"><span class="visually-hidden">parameter</span>Description</th><th scope="col"><span class="visually-hidden">parameter</span>Type</th><th scope="col"><span class="visually-hidden">parameter</span>Default value</th></tr></thead><tbody><tr class="item__parameter"><th scope="row" data-label="name"><code>$total-columns</