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export default class FetchError extends Error {  public status: number;  public details: Record<string, unknown>;
  constructor(    status: number,    message: string,    details?: Record<string, unknown>,    opts?: ErrorOptions,  ) {    super(message, opts);    this.status = status;    this.details = details ?? {};  }
  static async fromResponse(res: Response): Promise<FetchError> {    let status = res.status;    let message = (await res.text());    const details: Record<string, unknown> = {};    if (message.startsWith("{") && message.endsWith("}")) {      try {        const data = JSON.parse(message);        const { status: maybeStatus, message: maybeMessage, details: maybeDetail, ...rest } = data;        if (typeof maybeStatus === "number") {          status = maybeStatus;        }        if (typeof maybeMessage === "string") {          message = maybeMessage;        }        if (maybeDetail !== null && typeof maybeDetail === "object" && !Array.isArray(maybeDetail)) {          Object.assign(details, maybeDetail);        }        Object.assign(details, rest);      } catch (_e) {        // ignore      }    }    return new FetchError(status, message, details);  }}