import { ConfigurationProperties, Reloadable, Loadable } from '@zetapush/core';
export declare class Json5ConfigurationProperties implements ConfigurationProperties, Loadable, Reloadable {
    private file;
    private conf?;
    constructor(file: string);
    load(): Promise<void>;
    canLoad(): Promise<boolean>;
    reload(): Promise<void>;
    canReload(): Promise<boolean>;
    has(key: string): boolean;
    get<T>(key: string): T | null;
    get<T>(key: string, defaultValue: T): T;
    getOrThrow<T, E extends Error>(key: string, error?: E): T;
}