import type { IContributionRegistry, RegistryKey } from './types';
export declare class ContributionRegistry<T = unknown> implements IContributionRegistry<T> {
    private readonly entries;
    register(key: RegistryKey, contribution: T): void;
    unregister(key: RegistryKey, contribution?: T): void;
    get(key: RegistryKey): T[];
    getAll(): T[];
    clear(key?: RegistryKey): void;
}