/**
 * Represents an error that was caused by another error.
 */
export declare class ErrorWithCause extends Error {
    readonly cause: Error;
    /**
     * Create an instance of ErrorWithCause.
     * @param message - Error message.
     * @param cause - Original error, causing this error.
     */
    constructor(message: string, cause: Error);
    private isAxiosError;
    private addStack;
    /**
     * Root cause of the error.
     * If there are multiple errors caused one by another, the root cause is the first error that occurred.
     * In case there is no root cause.
     * @returns The root cause.
     */
    get rootCause(): Error;
}
/**
 * Type guard to check whether an error is of type ErrorWithCause.
 * @param err - An error.
 * @returns Whether the given error is of type ErrorWithCause.
 */
export declare function isErrorWithCause(err: Error): err is ErrorWithCause;