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@angular/material

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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 https://angular.io/license */ import { CanDisable, CanDisableCtor } from '../common-behaviors/disabled'; /** @docs-private */ declare class MatOptgroupBase { } declare const _MatOptgroupMixinBase: CanDisableCtor & typeof MatOptgroupBase; /** * Component that is used to group instances of `mat-option`. */ export declare class MatOptgroup extends _MatOptgroupMixinBase implements CanDisable { /** Label for the option group. */ label: string; /** Unique id for the underlying label. */ _labelId: string; } export {};