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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;
    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;    }
}