return new Promise(function(resolve, reject) {
var requestHeaders = {};
_.extend(requestHeaders, constants.HTTP_HEADERS.accept.data, constants.HTTP_HEADERS.content_type.data, {
return new Promise(function(resolve, reject) {
var requestHeaders = {};
_.extend(requestHeaders, constants.HTTP_HEADERS.accept.data, constants.HTTP_HEADERS.content_type.data, {