/**
 * Use of this source code is governed by an MIT-style license that can be
 * found in the LICENSE file at https://github.com/NG-ZORRO/ng-zorro-antd/blob/master/LICENSE
 */
import { SelectionModel } from '@angular/cdk/collections';
export interface NzGraphBaseSource<T, K> {
    /** The saved graph nodes data for `expandAll` action. */
    dataSource: T;
    /** The expansion model */
    expansionModel: SelectionModel<K>;
    /** Whether the data node is expanded or collapsed. Return true if it's expanded. */
    isExpanded(dataNode: K): boolean;
    /** Expand or collapse data node */
    toggle(dataNode: K): void;
    /** Expand one data node */
    expand(dataNode: K): void;
    /** Collapse one data node */
    collapse(dataNode: K): void;
    /** Expand all the dataNodes in the tree */
    expandAll(): void;
    /** Collapse all the dataNodes in the tree */
    collapseAll(): void;
}