import { Observable } from 'rxjs';
import { TreeNodeModel } from './models/tree-node.model';
import * as i0 from "@angular/core";
export declare class TreeFocusManagerService<T> {
    rootNodeModels: TreeNodeModel<T>[];
    private focusedNodeId;
    private _focusRequest;
    private _focusChange;
    get focusRequest(): Observable<string>;
    get focusChange(): Observable<string>;
    focusNode(model: TreeNodeModel<T>): void;
    broadcastFocusedNode(nodeId: string): void;
    focusParent(model: TreeNodeModel<T>): void;
    focusFirstVisibleNode(): void;
    focusLastVisibleNode(): void;
    focusNodeAbove(model: TreeNodeModel<T>): void;
    focusNodeBelow(model: TreeNodeModel<T>): void;
    focusNodeStartsWith(searchString: string, model: TreeNodeModel<T>): void;
    private findSiblings;
    private findLastVisibleInNode;
    private findNextFocusable;
    private findLastVisibleInTree;
    private findNodeAbove;
    private findNodeBelow;
    private findDescendentNodeStartsWith;
    private findSiblingNodeStartsWith;
    private findRootNodeStartsWith;
    private findNodeStartsWith;
    private findClosestNodeStartsWith;
    static ɵfac: i0.ɵɵFactoryDeclaration<TreeFocusManagerService<any>, never>;
    static ɵprov: i0.ɵɵInjectableDeclaration<TreeFocusManagerService<any>>;
}