import { RequestClient } from '../request/RequestClient';
/**
 * Exchanges the refresh token for an access token for the given client.
 * @param requestClient - the pre-configured HTTP request client
 * @param refreshToken - the refresh token received from the server.
 */
export declare function refreshTokensForSasjs(requestClient: RequestClient, refreshToken: string): Promise<{
    access_token: string;
    refresh_token: string;
}>;