How to use the app.getInstance function in app

var $ = require('jquery');
    var _ = require('underscore');
    var Util = require('util');
    var App = require('app');
    var Localization = require('localization');
    var MarkdownViewer = require('components/markdown/MarkdownViewer');
    var SingletonDefectTypeCollection = require('defectType/SingletonDefectTypeCollection');
    var LaunchItemMenuView = require('launches/launchLevel/LaunchItemMenuView');
    var LaunchSuiteDefectsView = require('launches/common/LaunchSuiteDefectsView');
    var ItemDurationView = require('launches/common/ItemDurationView');
    var ItemStartTimeView = require('launches/common/ItemStartTimeView');
    var SingletonLaunchFilterCollection = require('filters/SingletonLaunchFilterCollection');
    var ModalLaunchItemEdit = require('modals/modalLaunchItemEdit');
    var CommonItemView = require('launches/common/CommonItemView');

    var config = App.getInstance();

    var LaunchSuiteItemView = CommonItemView.extend({
        template: 'tpl-launch-suite-item',
        className: 'row rp-table-row',
        statusTpl: 'tpl-launch-suite-item-status',
        events: {
            click: 'onClickView',
            'click [data-js-name-link]': 'onClickName', // common method
            'click [data-js-launch-menu]': 'showItemMenu',
            'click [data-js-item-edit]': 'onClickEdit',
            'click [data-js-tag]': 'onClickTag',
            'click [data-js-owner-name]': 'onClickOwnerName',
            'click [data-js-statistics-to-investigate]': 'onClickToInvestigate',
            'click [data-js-toggle-open]': 'onClickOpen',
            'click [data-js-select-label]': 'onClickSelectLabel',
            'click [data-js-select-item]': 'onClickSelectInput'

define(function (require) {
    'use strict';

    var $ = require('jquery');
    var _ = require('underscore');
    var Epoxy = require('backbone-epoxy');
    var Util = require('util');
    var App = require('app');
    var CallService = require('callService');
    var memberService = require('memberService');
    var Urls = require('dataUrlResolver');
    var ModalConfirm = require('modals/modalConfirm');
    var Localization = require('localization');
    var DropDownComponent = require('components/DropDownComponent');

    var config = App.getInstance();

    var MembersItemView = Epoxy.View.extend({
        tpl: 'tpl-users-projects-item',
        className: 'row rp-table-row user-projects-row',

        bindings: {
            '[data-js-project]': 'text: projectId',
            '[data-js-project-role]': 'text: getProjectRole',
            '[data-js-dropdown-roles]': 'updateRoleDropDown: projectRole',
            '[data-js-unassign]': 'classes: {disabled: not(canUnAssign)}, attr: {disabled: not(canUnAssign)}',
            // '[data-js-user-select-role]': 'classes: {hide: isAdmin}',
            // '[data-js-admin-role]': 'classes: {hide: not(isAdmin)}',

        },

        computeds: {

define(function (require) {
    'use strict';

    var $ = require('jquery');
    var Epoxy = require('backbone-epoxy');
    var FilterEntitiesView = require('filterEntities/FilterEntitiesView');
    var Util = require('util');
    var App = require('app');
    var ModalFilterEdit = require('modals/modalFilterEdit');
    var FilterListener = require('controlers/filterControler/FilterListener');
    var FilterSortingView = require('filterSelectionParameters/FilterSortingView');

    var config = App.getInstance();

    var FilterPanelView = Epoxy.View.extend({
        template: 'tpl-launch-filter-panel',
        events: {
            'click [data-js-edit-filter]': 'onClickEdit',
            'click [data-js-discard-filter]': 'onClickDiscard',
            'click [data-js-save-filter]': 'onClickSave',
            'click [data-js-clone-filter]': 'onClickClone'
        },
        bindings: {
            '[data-js-filter-not-save-descr]': 'classes: {hide: all(not(temp), not(newEntities), not(newSelectionParameters))}',
            '[data-js-filter-shared-descr]': 'classes: {hide: any(not(share), notMyFilter)}',
            '[data-js-save-filter]': 'attr: {disabled: any(all(not(newEntities), not(newSelectionParameters)), notMyFilter)}',
            '[data-js-discard-filter]': 'attr: {disabled: all(not(newEntities), not(newSelectionParameters))}',
            '[data-js-edit-filter]': 'attr: {disabled: any(temp, notMyFilter)}',
            '[data-js-clone-filter]': 'attr: {disabled: all(not(entities), not(newEntities))}',

define(function (require) {
    'use strict';

    var $ = require('jquery');
    var _ = require('underscore');
    var Util = require('util');
    var Moment = require('moment');
    var BaseWidgetView = require('newWidgets/_BaseWidgetView');
    var Localization = require('localization');
    var SingletonUserStorage = require('storage/SingletonUserStorage');
    var App = require('app');
    var config = App.getInstance();

    var FlakyTestCases = BaseWidgetView.extend({

        template: 'tpl-widget-flaky-test-cases-table',
        itemTemplate: 'tpl-widget-flaky-test-cases-table-item',
        className: 'flaky-test-cases',
        events: {
            'click [data-js-date]': 'formatDate',
            'click [data-js-link]': 'onClickItem'
        },

        render: function () {
            var self = this;
            var contentData = this.model.getContent();
            var itemsHtml = '';
            var launchData;

var SingletonLaunchFilterCollection = require('filters/SingletonLaunchFilterCollection');

    var $ = require('jquery');
    var _ = require('underscore');
    var Backbone = require('backbone');
    var Epoxy = require('backbone-epoxy');
    var App = require('app');
    var Util = require('util');
    var FilterModel = require('filters/FilterModel');
    var CallService = require('callService');
    var Urls = require('dataUrlResolver');
    var call = CallService.call;
    var SingletonAppStorage = require('storage/SingletonAppStorage');
    var Localization = require('localization');

    var config = App.getInstance();

    var LaunchCrumbModel = Epoxy.Model.extend({
        defaults: {
            id: '',
            name: '',
            url: '',
            partUrl: '',
            level: '',
            type: 'FILTER',
            isProcessing: false,
            number: '',
            listView: false,
            failLoad: false,
            nextModelId: '',
            afterListView: false
        },