import { HttpClient } from '@angular/common/http'; import { ApolloLink, Observable as LinkObservable, Operation, FetchResult } from 'apollo-link'; import { Options } from 'apollo-angular-link-http-common'; export declare class HttpLinkHandler extends ApolloLink { private httpClient; private options; requester: (operation: Operation) => LinkObservable<FetchResult> | null; constructor(httpClient: HttpClient, options: Options); request(op: Operation): LinkObservable<FetchResult> | null; } export declare class HttpLink { private httpClient; constructor(httpClient: HttpClient); create(options: Options): HttpLinkHandler; }