in Dataset/JS/AngularCalendar/calendar.js [110:120]
var getTokens = function () {
return ((angular.isFunction(arraySource) ? arraySource() : arraySource) || []).reduce(
function (rslt, el) {
var token = tokenFn(el);
map[token] = el;
rslt.push(token);
return rslt;
},
[]
);
};