/**
 * @license
 * Copyright 2025 Google LLC
 * SPDX-License-Identifier: Apache-2.0
 */
export declare class FetchError extends Error {
    code?: string | undefined;
    constructor(message: string, code?: string | undefined);
}
export declare function isPrivateIp(url: string): boolean;
export declare function fetchWithTimeout(url: string, timeout: number, signal?: AbortSignal, init?: RequestInit): Promise<Response>;
export declare function setGlobalProxy(proxy: string): void;