code: function(rel, href, mimetype) {
              if (_.isObject(rel)) {
                  _.each(rel, function(value, name) {
                      this.link(name, value);
                  }, this);
                  return;
              }
  
              var mt =  this.$('link[rel="'+rel+'"]');
              if (mt.length === 0) {
                  mt =  $("<link>", {}).attr("rel", rel).appendTo(this.$el);
              }
              if (mimetype != null) mt.attr("type", mimetype);
              if (href != null) {
                  mt.attr('href', href);
              } else {
                  return mt.attr('href');
              }
          }
docs: Set or get a link tag value
  
  @method link
  @param {string} ref name of the link tag
  @param {string} [href] value to set on the link tag
  @param {string} [mimetype] mimetype for this link
  @return {string} value of the link tag