/// <reference lib="dom" />
/**
 * Import DOM types for this module _just_ to expose adequate types for
 * fetch interfaces
 */
import { HttpClient } from '../../http-client';
/**
 * @internal
 */
export declare class FetchClient implements HttpClient {
    private maxConcurrentRequests;
    private requestIntervalMs;
    private pendingRequests;
    private timeout;
    withTimeout(timeout?: number): this;
    get<T>(url: string, config?: {
        headers: Record<string, string>;
    }): Promise<T>;
    delete<T>(url: string, config?: {
        headers: Record<string, string>;
    }): Promise<T>;
    head<T>(url: string, config?: {
        headers: Record<string, string>;
    }): Promise<T>;
    post<T>(url: string, data?: unknown, config?: {
        headers: Record<string, string>;
    }): Promise<T>;
    put<T>(url: string, data?: unknown, config?: {
        headers: Record<string, string>;
    }): Promise<T>;
    patch<T>(url: string, data?: unknown, config?: {
        headers: Record<string, string>;
    }): Promise<T>;
    private request;
    private isBuffer;
    private waitInQueue;
}