How to use the jasmine.describe function in jasmine

import {browser, by, element, protractor} from "protractor";
import {beforeEach, describe, expect, fail, it} from "jasmine";

describe('ag-grid-angular-examples E2E Tests', function () {

    let expectedTabTitles = ['Rich Grid Example',
        'Rich Grid with Declarative Markup',
        'Dynamic Angular Component Example',
        'Dynamic Angular Components - Richer Example',
        'Cell Editor Component Example',
        'Pinned Row Renderer Example',
        'Full Width Renderer Example',
        'Grouping with Auto Group Columns Example',
        'Grouped Row Inner Renderer Example',
        'Filters Component Example',
        'Master Detail Example',
        'Floating Filters',
        'Infinite Pagination',
        'Aligned Grids Example',
        'RxJs - Single Row Update Example',

import {browser, by, element, protractor} from "protractor";
import {beforeEach, describe, expect, fail, it} from "jasmine";

describe('ag-grid-angular-examples E2E Tests', function () {

    let expectedTabTitles = ['Rich Grid Example',
        'Rich Grid with Declarative Markup',
        'Dynamic Angular Component Example',
        'Dynamic Angular Components - Richer Example',
        'Cell Editor Component Example',
        'Pinned Row Renderer Example',
        'Full Width Renderer Example',
        'Grouping with Auto Group Columns Example',
        'Grouped Row Inner Renderer Example',
        'Filters Component Example',
        'Master Detail Example',
        'Floating Filters',
        'Infinite Pagination',
        'Aligned Grids Example',
        'RxJs - Single Row Update Example',