import { Options } from './abstractRestfulClient';
import { GetProductsType } from './catalog';
import { AbstractHttpClient } from './AbstractHttpClient';
import { GraphQLClient } from 'graphql-request';
export declare type GraphQLResponseTypes = GetProductsType;
export declare abstract class AbstractGraphQLClient extends AbstractHttpClient {
    /**
     * Must not be called directly.
     * Use getClientInstance() to access it.
     */
    protected graphQLClient: GraphQLClient;
    protected optionsHeader?: RequestInit['headers'];
    protected options: Options;
    private getClientInstance;
    setOptions(options: Options): this;
    protected post<GraphQLResponseTypes>(query: string): Promise<GraphQLResponseTypes>;
    private applyHeaders;
    private generateUrl;
    protected stringifyQuery(query: unknown): string;
}