export declare function normalize(error: unknown): Error;
export declare class SpecError extends Error {
    readonly name: string;
    readonly cause: Error;
    constructor(name: string, cause: Error);
}
export declare class ValueError extends Error {
    readonly name: string;
    readonly isSensitive: boolean;
    readonly value: string;
    readonly cause: Error;
    constructor(name: string, isSensitive: boolean, value: string, cause: Error);
}
export declare class NotSetError extends Error {
    readonly name: string;
    constructor(name: string);
}