/** @packageDocumentation
 * @module Core
 */
import { IModelConnection } from "@bentley/imodeljs-frontend";
import { NodeKey } from "@bentley/presentation-common";
import { IpcRequestsHandler } from "./IpcRequestsHandler";
/**
 * Data structure that describes information used by [[StateTracker]] to identify node.
 * @internal
 */
export interface NodeIdentifier {
    id: string;
    key: NodeKey;
}
/** @internal */
export declare class StateTracker {
    private _expandedHierarchies;
    private _ipcRequestsHandler;
    constructor(ipcRequestsHandler: IpcRequestsHandler);
    private updateHierarchyStateIfNeeded;
    onHierarchyClosed(imodel: IModelConnection, rulesetId: string, sourceId: string): Promise<void>;
    onExpandedNodesChanged(imodel: IModelConnection, rulesetId: string, sourceId: string, expandedNodes: NodeIdentifier[]): Promise<void>;
}
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