import { LocationBarNode, NodeId } from './location-bar.model';
import { Observable } from 'rxjs';
import { InjectionToken } from '@angular/core';
import { SearchResponseModel } from './location-bar.search.model';
export declare const CONTENT_PROVIDER: InjectionToken<any>;
/**
 * Interface denoting the contract between the location bar component and
 * its users. The content provider offers callback methods for the location bar
 * component to gather the content to be displayed.
 */
export declare abstract class LocationBarContentProvider<T extends NodeId> {
    /**
     * Determines the children of the given node. This will only be called if the children of the node are falsy.
     * This enables lazy loading of children. This method should not return a falsy value but at least an empty array.
     *
     * @param node The children of this node should be determined
     */
    abstract getLazyChildren(node: LocationBarNode<T>): Observable<LocationBarNode<T>[]>;
    /**
     * Notify users that search is performed and that nodes should be filtered.
     *
     * @param _response Search response
     */
    searchPerformed(_response: SearchResponseModel<T>): void;
}