This API will show segmnet list to subscriber registered. it will return true or false
var toBeReturn = _pa_subscriberSegments();
console.log(toBeReturn);
//return json array
"["YourCreatedSegmentName1","YourCreatedSegmentName2","YourCreatedSegmentName3"]"
var thenProm = toBeReturn.then(function(value){
console.log(value);
});