import ApolloClient from "apollo-client";
import { GraphClient, MutationOptions, QueryOptions } from "../spi/graph/GraphClient";
/**
 * Implementation of GraphClient using Apollo Client.
 */
export declare class ApolloGraphClient implements GraphClient {
    endpoint: string;
    /**
     * Configured Apollo Client instance subclasses can use directly
     */
    readonly client: ApolloClient<any>;
    /**
     * Create a new GraphClient
     * @param endpoint GraphQL endpoint
     * @param headers any special headers to use
     */
    constructor(endpoint: string, headers?: any);
    query<T, Q>(options: QueryOptions<Q> | string): Promise<T>;
    mutate<T, Q>(options: MutationOptions<Q> | string): Promise<T>;
    private executeQuery;
    private executeMutation;
}