var UUID = function (){ 
return _AN_Call_replace('replace', 'xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxx', /[xy]/g, function (c){ 
var r = Math.random() * 16 | 0; 
var v = (c === 'x')? r: (r & 3 | 8); 
return v.toString(16); 
} 
); 
} 
; 
module.exports = UUID;