import type { LoadError, LoadOptions, ResolveOptions, Schedule, ScheduleRawMap, Version, VersionRaw } from './types.js';
export type LoadCallback = (error?: LoadError, semvers?: NodeVersions) => void;
export default class NodeVersions {
    versions: Version[];
    schedules: Schedule[];
    constructor(versions: VersionRaw[], schedule: ScheduleRawMap);
    static load(callback: LoadCallback): void;
    static load(options: LoadOptions, callback: LoadCallback): void;
    static load(options?: LoadOptions): Promise<NodeVersions>;
    static loadSync(options?: LoadOptions): NodeVersions | null;
    resolve(expression: string | number | Date, options?: ResolveOptions): string | string[] | Version | Version[] | null;
}