import type { UmbSectionMenuItemExpansionEntryModel } from '../../types.js';
import type { Observable } from '../../../../../../libs/observable-api/index.js';
import { UmbEntityExpansionManager } from '../../../../utils/index.js';
/**
 * Manages the expansion state of a section sidebar menu.
 * @exports
 * @class UmbSectionSidebarMenuAppExpansionManager
 * @augments {UmbControllerBase}
 */
export declare class UmbSectionSidebarMenuAppExpansionManager extends UmbEntityExpansionManager<UmbSectionMenuItemExpansionEntryModel> {
    /**
     * Returns an observable of the expansion state filtered by section alias.
     * @param {string} sectionAlias The alias of the section to filter by.
     * @returns {Observable<UmbSectionMenuItemExpansionEntryModel[]>} An observable of the expansion state for the specified section alias.
     * @memberof UmbSectionSidebarMenuAppExpansionManager
     */
    expansionBySectionAlias(sectionAlias: string): Observable<UmbSectionMenuItemExpansionEntryModel[]>;
}