5.2 #Center utility classes.full-height Expands element to 100% height of parent

Toggle example guides Toggle HTML markup

-sf-full-height

Grey child is as tall as parent
Html 
    <div style="height: 300px; width: 300px; border:1px solid #eee">
     <div class="-sf-full-height" style="background-color: #fefefe;">Grey child is as tall as parent</div>
    </div>