export declare const uploadFetch: (url: string | URL, options: any) => Promise<unknown>;
/**
 * custom fetch， support onUploadProgress
 * https://github.com/jaydenseric/apollo-upload-client/issues/88
 */
export declare const createUploadFetch: (preferredFetch?: WindowOrWorkerGlobalScope['fetch']) => (uri: any, options: any) => Promise<unknown>;