code: function ForecastIoAPIError(url, statusCode, body) {
    this.response = {
      statusCode: statusCode,
      body: body
    };
    this.message = this._formatErrorMessage(body);
    this.name = "ForecastIoAPIError";
    Error.call(this);
    Error.captureStackTrace(this, arguments.callee);
    this.request = "GET " + url;
  }
docs: Represents API errors.