| /** |
| * @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 { Observable } from 'rxjs'; |
| /** Represents a range of numbers with a specified start and end. */ |
| export declare type ListRange = { |
| start: number; |
| end: number; |
| }; |
| /** |
| * Interface for any component that provides a view of some data collection and wants to provide |
| * information regarding the view and any changes made. |
| */ |
| export interface CollectionViewer { |
| /** |
| * A stream that emits whenever the `CollectionViewer` starts looking at a new portion of the |
| * data. The `start` index is inclusive, while the `end` is exclusive. |
| */ |
| viewChange: Observable<ListRange>; |
| } |