import { HttpClient } from '@sisense/sdk-rest-client';
/**
 * Factory function to create a custom fetch for OpenAI Chat Completions and Responses APIs.
 * Applies authentication headers from the provided httpClient and user action tracking headers.
 * @param httpClient - The HTTP client instance to use for authentication
 * @returns Custom fetch function
 */
export declare function createCustomFetch(httpClient: HttpClient): (url: RequestInfo | URL, init?: RequestInit) => Promise<Response>;