/**-----------------------------------------------------------------------------------------
* Copyright © 2026 Progress Software Corporation. All rights reserved.
* Licensed under commercial license. See LICENSE.md in the project root for more information
*-------------------------------------------------------------------------------------------*/
import { GroupDescriptor } from '@progress/kendo-data-query';
import { ColumnList } from '../columns/column-list';
import { GroupItem } from '../data/group-item.interface';
/**
 * @hidden
 */
export declare class GroupInfoService {
    private _columnList;
    private get columns();
    registerColumnsContainer(columns: () => ColumnList): void;
    formatForGroup(item: GroupItem | GroupDescriptor): string;
    isGroupable(groupField: string): boolean;
    groupTitle(item: GroupItem | GroupDescriptor): string;
    groupHeaderTemplate(item: GroupItem | GroupDescriptor): any;
    private groupField;
    private columnForGroup;
}