/**
* Decide if a method may carry a body. Used to gate body serialization.
*
* Per RFC 9110: GET / HEAD / OPTIONS / TRACE / CONNECT either don't take
* a body or it's discouraged enough that we drop it silently. DELETE may
* carry a body and is allowed.
*/
export declare function isPayloadMethod(method: string): boolean;
/**
* Serialize a body for `fetch`. Plain objects/arrays go through `stringifyJson`
* (default `JSON.stringify`) and `content-type: application/json` is set when
* the user hasn't picked one. Pass-through for FormData/Blob/URLSearchParams/
* streams/strings.
*/
export declare function serializeBody(body: unknown, headers: Record<string, string>, stringifyJson: (value: unknown) => string): BodyInit | null | undefined;
/**
* Detect whether a response is body-less (HEAD, 204/304/1xx, content-length: 0,
* opaque cross-origin response). Used to short-circuit JSON.parse and friends.
* Covers misina #27 and #33.
*/
export declare function isBodylessResponse(response: Response, method: string): boolean;
export declare function parseResponseBody(response: Response, method: string, parseJson: (text: string, ctx?: {
	request: Request;
	response: Response;
}) => unknown, responseType?: "json" | "text" | "arrayBuffer" | "blob" | "stream", request?: Request): Promise<unknown>;