import { fetch, clearCache, setVirtualSourceData, isVirtualUrl, setRetryCount, setPoolSize as setFetchPoolSize } from '@jspm/fetch';
export type { CachedResponse, FetchOptions, SourceData } from '@jspm/fetch';
export { fetch, clearCache, setVirtualSourceData, isVirtualUrl, setRetryCount, setFetchPoolSize };
export type WrappedResponse = {
    url: string;
    headers: Headers;
    ok: boolean;
    status: number;
    statusText?: string;
    text?(): Promise<string>;
    json?(): Promise<any>;
    arrayBuffer?(): Promise<ArrayBuffer>;
};
export type FetchFn = (url: URL | string, ...args: any[]) => Promise<WrappedResponse | globalThis.Response>;
export type WrappedFetch = FetchFn;
/**
 * Replace the underlying network fetch. Virtual sources, protocol handlers,
 * pool, retry, in-flight dedup, and caching continue to wrap it.
 */
export declare function setFetch(fn: (url: string, init: RequestInit) => Promise<Response>): void;