import { Template } from 'meteor/templating'; Template.studyBrowserList.onCreated(() => { const instance = Template.instance(); if (instance.data.studiesData) { instance.studiesData = instance.data.studiesData; } }); Template.studyBrowserList.helpers({ getStudiesInformation() { const instance = Template.instance(); let studiesInformation; if (instance.studiesData) { studiesInformation = instance.studiesData.get() || []; } else { studiesInformation = instance.data.studiesInformation || []; } const result = new Map(); studiesInformation.forEach(item => result.set(item.studyInstanceUid, item)); return Array.from(result.values()); } });