| /** |
| * @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 |
| */ |
| /** @docs-private */ |
| export declare function getSortDuplicateSortableIdError(id: string): Error; |
| /** @docs-private */ |
| export declare function getSortHeaderNotContainedWithinSortError(): Error; |
| /** @docs-private */ |
| export declare function getSortHeaderMissingIdError(): Error; |
| /** @docs-private */ |
| export declare function getSortInvalidDirectionError(direction: string): Error; |