in src/apache-unomi-tracker.js [525:541]
buildEvent: function (eventType, target, source) {
/** @type {UnomiEvent} */
var event = {
eventType: eventType,
scope: wem.digitalData.scope
};
if (target) {
event.target = target;
}
if (source) {
event.source = source;
}
return event;
},