Make GroupsStore.store method non-static

app/assets/javascripts/groups/stores/groups_store.js

-/* eslint-disable class-methods-use-this */
 export default class GroupsStore {
   constructor() {
     this.state = {};
@@ -104,11 +103,11 @@ export default class GroupsStore {
   }
 
   decorateGroups(rawGroups) {
-    this.groups = rawGroups.map(GroupsStore.decorateGroup);
+    this.groups = rawGroups.map(this.decorateGroup);
     return this.groups;
   }
 
-  static decorateGroup(rawGroup) {
+  decorateGroup(rawGroup) {
     return {
       id: rawGroup.id,
       fullName: rawGroup.full_name,
@@ -130,6 +129,7 @@ export default class GroupsStore {
     };
   }
 
+  // eslint-disable-next-line class-methods-use-this
   static toggleSubGroups(toggleGroup) {
     const group = toggleGroup;
     group.isOpen = !group.isOpen;

spec/javascripts/groups/group_item_spec.js

@@ -6,11 +6,13 @@ import { group1 } from './mock_data';
 describe('Groups Component', () => {
   let GroupItemComponent;
   let component;
+  let store;
   let group;
 
   beforeEach((done) => {
     GroupItemComponent = Vue.extend(groupItemComponent);
-    group = GroupsStore.decorateGroup(group1);
+    store = new GroupsStore();
+    group = store.decorateGroup(group1);
 
     component = new GroupItemComponent({
       propsData: {