import { CollectionViewer, DataSource, SelectionChange } from '@angular/cdk/collections';
import { FlatTreeControl } from '@angular/cdk/tree';
import { BehaviorSubject, Observable } from 'rxjs';
import { DynamicFlatNode } from '../models';
import { NodeTreeService } from '../services/node-tree.service';
export declare class NodeTreeDataSource implements DataSource<DynamicFlatNode> {
    private _treeControl;
    private _database;
    dataChange: BehaviorSubject<DynamicFlatNode[]>;
    data: DynamicFlatNode[];
    constructor(_treeControl: FlatTreeControl<DynamicFlatNode>, _database: NodeTreeService);
    connect(collectionViewer: CollectionViewer): Observable<DynamicFlatNode[]>;
    disconnect(collectionViewer: CollectionViewer): void;
    /** Handle expand/collapse behaviors */
    handleTreeControl(change: SelectionChange<DynamicFlatNode>): void;
    /**
     * Toggle the node, remove from display list
     */
    toggleNode(node: DynamicFlatNode, expand: boolean): Promise<void>;
    /**
     * Reload the node, remove from display list
     */
    reloadNode(node: DynamicFlatNode): Promise<void>;
}