ems-web-app-view-container/lib/view-container.interfaces.d.ts

This angular.io module includes a component and service that can be used to render nested view containers that transition between screens (e.g., a tab container).

import { TemplateRef } from '@angular/core';
export interface IView {
    containerId: string;
    viewId: string | null;
    template: TemplateRef<any> | null;
}