import "whatwg-fetch"; export declare function coreFetch(method: "GET" | "POST" | "PUT" | "DELETE", url: string, data?: RQ): Promise; export declare function httpDelete(url: string): Promise; export declare function httpGet(url: string): Promise; export declare function httpPost(url: string, data: RQ): Promise; export declare function httpPut(url: string, data: RQ): Promise;