import type { UmbPickerTreeDataSource } from './types.js';
/**
 * Checks if the given data source is a tree data source.
 * @param {unknown} dataSource - The data source to check
 * @returns {boolean} True if the data source is a tree data source
 */
export declare function isPickerTreeDataSource(dataSource: unknown): dataSource is UmbPickerTreeDataSource;