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* @license
* Copyright Google LLC All Rights Reserved.
* Use of this source code is governed by an MIT-style license that can be
* found in the LICENSE file at
import {Injector} from '@angular/core';
* Custom injector to be used when providing custom
* injection tokens to components inside a portal.
* @docs-private
export class PortalInjector implements Injector {
private _parentInjector: Injector,
private _customTokens: WeakMap<any, any>) { }
get(token: any, notFoundValue?: any): any {
const value = this._customTokens.get(token);
if (typeof value !== 'undefined') {
return value;
return this._parentInjector.get<any>(token, notFoundValue);