Bootstrap 3 Glyphicon Link class CSS

Bootstrap 3 Glyphicon Link class CSS.css

//The parent class styles
.glyphicon {
    display: inline-block;
    font-family: "Glyphicons Halflings";
    font-style: normal;
    font-weight: 400;
    line-height: 1;
    position: relative;
    top: 1px;
}

//For the specific glyphicon-link icon
//As we can see all this does is chuck the appropriate character into the pseudo before element
.glyphicon-link:before{
    content: "";
}