/**
 * Sets a custom name for `Error` via the `constructor` property.
 * Extend this if you want custom names in errors.
 *
 * @warn If you have a minifier that minifies the name of the extending class,
 * this will set the name to the minified name.
 */
export declare class CustomError extends Error {
    /**
     * @param message The error message
     */
    constructor(message?: string);
}
/**
 * {@linkcode CustomError} which stores `public code: number`
 */
export declare class ErrorWithCode extends CustomError {
    code: number;
    /**
     * @param code The (public) error code
     * @param message The error message
     */
    constructor(code: number, message?: string);
}