/**
 * @license
 * Copyright Google Inc. All Rights Reserved.
 *
 * Use of this source code is governed by an MIT-style license that can be
 * found in the LICENSE file at https://angular.io/license
 */
import { ProviderToken } from './provider-token';
export declare const THROW_IF_NOT_FOUND: Object;
/**
 * @whatItDoes Injector interface
 * @howToUse
 * ```
 * const injector: Injector = ...;
 * injector.get(...);
 * ```
 *
 * @description
 * For more details, see the {@linkDocs guide/dependency-injection "Dependency Injection Guide"}.
 *
 * ### Example
 *
 * {@example core/di/ts/injector_spec.ts region='Injector'}
 *
 * `Injector` returns itself when given `Injector` as a token:
 * {@example core/di/ts/injector_spec.ts region='injectInjector'}
 *
 * @stable
 */
export declare abstract class Injector {
    static THROW_IF_NOT_FOUND: Object;
    static NULL: Injector;
    abstract get<T>(token: ProviderToken, notFoundValue?: T): T;
    abstract get<T>(token: ProviderToken<T>, notFoundValue?: T): T;
    abstract get<T>(token: ProviderToken, notFoundValue?: T | null): T | null;
    abstract get<T>(token: ProviderToken<T>, notFoundValue?: T | null): T | null;
    /**
     * @deprecated use {@link ProviderToken} instead
     * @suppress {duplicate}
     */
    abstract get(token: any, notFoundValue?: any): any;
}