lib/Ext/viewport/Default.js
function(side, animation){
        var menus = this.getMenus();

        for (var menu in menus) {
            if (side != menu) {
                this.hideMenu(menu, animation);
            }
        }
    }
function(side, animation){
        var menus = this.getMenus();

        for (var menu in menus) {
            if (side != menu) {
                this.hideMenu(menu, animation);
            }
        }
    }
Hides all menus except for the side specified
@param {String} side         Side(s) not to hide
@param {String} animation    Animation to hide with