/**-----------------------------------------------------------------------------------------
* Copyright © 2026 Progress Software Corporation. All rights reserved.
* Licensed under commercial license. See LICENSE.md in the project root for more information
*-------------------------------------------------------------------------------------------*/
import { ExpandableDirective } from '@progress/kendo-angular-treelist';
import * as i0 from "@angular/core";
/**
 * Represents a directive that controls the expanded state of Gantt items.
 *
 * @example
 * ```html
 * <kendo-gantt kendoGanttExpandable [expandedKeys]="expandedKeys"></kendo-gantt>
 * ```
 *
 * @remarks
 * Applied to: {@link GanttComponent}
 */
export declare class GanttExpandableDirective extends ExpandableDirective {
    /**
     * Sets the item key stored in the `expandedKeys` collection.
     * The default value is the task data item ID field, specified in the `taskModelFields` object.
     */
    set expandBy(value: string | ((dataItem: any) => any));
    static ɵfac: i0.ɵɵFactoryDeclaration<GanttExpandableDirective, never>;
    static ɵdir: i0.ɵɵDirectiveDeclaration<GanttExpandableDirective, "[kendoGanttExpandable]", ["kendoGanttExpandable"], { "expandBy": { "alias": "expandBy"; "required": false; }; }, {}, never, never, true, never>;
}