/**
 * Base class for errors that adds a [[toJSON]] function.
 */
export declare abstract class ErrorBase extends Error {
    /**
     * Initializes a new instance of the [[ErrorBase]] class.
     * @param message A description of the error.
     */
    protected constructor(message: string);
    /**
     * Returns a JSON representation of the current object instance.
     * @returns A JSON representation of the current object instance.
     */
    toJSON(): unknown;
    private getStackJson;
}