import { Observable } from "rxjs";
import { ProcessedHierarchyNode } from "../IModelHierarchyNode.js";
/** @internal */
export declare const LOGGING_NAMESPACE: string;
/**
 * Creates an operator that hides nodes and instead returns their children if the nodes have a `hideInHierarchy` handling param.
 *
 * @internal
 */
export declare function createHideNodesInHierarchyOperator(getNodes: (parentNode: ProcessedHierarchyNode) => Observable<ProcessedHierarchyNode>, stopOnFirstChild: boolean): (nodes: Observable<ProcessedHierarchyNode>) => Observable<ProcessedHierarchyNode>;
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