nction-calc-gutter-width"><code>calc-gutter-width</code></a></li></ul><h3 class="item__sub-heading">Used by</h3><ul class="list-unstyled"><li><span class="item__cross-type">[mixin]</span> <a href="#undefined-mixin-span-col"><code>span-col</code></a></li></ul><h3 class="item__sub-heading">See</h3><ul class="list-unstyled"><li><span class="item__cross-type">[variable]</span> <a href="#undefined-variable-grid-grid"><code>grid-grid</code></a></li></ul></section><section class="main__item container item" id="und