config.ts

/**
 * A function that is called to resolve a collection of lazy-loaded routes.
 */
export type LoadChildrenCallback = () => Type<any>| NgModuleFactory<any>| Promise<Type<any>>| Observable<Type<any>>;

/**
 * A string of the form `path/to/file#exportName` that acts as a URL for a set of routes to load,
 * or a function that returns such a set.
 */
export type LoadChildren = string | LoadChildrenCallback;