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export default class FetchError extends Error {  constructor(    public status: number,    public details: Record<string, unknown>,    message: string,    opts?: ErrorOptions,  ) {    super(message, opts);  }
  static async fromResponse(res: Response): Promise<FetchError> {    let message = res.statusText;    let details: Record<string, unknown> = {};    if (res.headers.get("content-type")?.startsWith("application/json")) {      details = await res.json();      if (typeof details.message === "string") {        message = details.message;      }    } else {      message = await res.text();    }    return new FetchError(res.status, details, message);  }}