define(function guidModule () {
return function guid () {
var s4 = function s4 () {
return Math.floor((1 + Math.random()) * 0x10000)
.toString(16)
.substring(1);
};
return s4() + s4() + '-' + s4() + '-' + s4() + '-' + s4() + '-' + s4() + s4() + s4();
};
});