| /** |
| * @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 {}; |
