in"><a href="#undefined-mixin-collapse">collapse</a></li><li class="sidebar__item sassdoc__item" data-group="undefined" data-name="respond-to" data-type="mixin"><a href="#undefined-mixin-respond-to">respond-to</a></li><li class="sidebar__item sassdoc__item" data-group="undefined" data-name="push-col" data-type="mixin"><a href="#undefined-mixin-push-col">push-col</a></li><li class="sidebar__item sassdoc__item" data-group="undefined" data-name="span-col" data-type="mixin"><a href="#undefined-mixin-span-col">s