interface AssertionErrorOptions {
    actual?: unknown;
    expected?: unknown;
    message?: string | Error;
    operator?: string;
    stackStartFn?: Function;
}
export declare class AssertionError extends Error {
    actual: unknown;
    expected: unknown;
    operator: string;
    code: string;
    generatedMessage: boolean;
    constructor(options: AssertionErrorOptions);
    toString(): string;
}
export {};