import { Constructor } from './lang';
export declare const $injectionKey: string;
export declare class Dependency {
    token: any;
    optional: boolean;
    lazy: boolean;
    static getAllFor<T>(t: Constructor<T>): Dependency[];
    static ensureAll(d: any[]): Dependency[];
    static ensureDependency(d: any): Dependency;
    constructor(token: any, optional?: boolean, lazy?: boolean);
}