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/** * Used to throw HTTP errors. * Just do throw new HttpError(code, message) in your controller action and * default error handler will catch it and give in your response given code and message . */export class HttpError extends Error {  httpCode: number | undefined = undefined;
  constructor(httpCode: number, message?: string) {    super();    Object.setPrototypeOf(this, HttpError.prototype);
    if (httpCode) {      this.httpCode = httpCode;    }    if (message) {      this.message = message;    }
    this.stack = new Error().stack;  }}