/**-----------------------------------------------------------------------------------------
* Copyright © 2025 Progress Software Corporation. All rights reserved.
* Licensed under commercial license. See LICENSE.md in the project root for more information
*-------------------------------------------------------------------------------------------*/
import { QueryList } from '@angular/core';
import { ColumnBase } from './column-base';
import { OptionChangesService } from '../common/option-changes.service';
import * as i0 from "@angular/core";
/**
* @hidden
*/
export declare function isColumnGroupComponent(column: any): column is ColumnGroupComponent;
/**
* Represents the column group header of the TreeList
* ([more information and examples]({% slug multicolumnheaders_columns_treelist %})).
*
* @example
* ```html
*
*
*
*
*
*
* ```
*/
export declare class ColumnGroupComponent extends ColumnBase {
/**
* @hidden
*/
includeInChooser: boolean;
/**
* @hidden
*/
isColumnGroup: boolean;
/**
* @hidden
*/
minResizableWidth: number;
/**
* @hidden
*/
children: QueryList;
constructor(parent?: ColumnBase, optionChanges?: OptionChangesService);
/**
* @hidden
*/
rowspan(): number;
/**
* @hidden
*/
get colspan(): number;
/**
* @hidden
*/
get leafIndex(): number;
get childrenArray(): any[];
get hasChildren(): boolean;
private get firstChild();
static ɵfac: i0.ɵɵFactoryDeclaration;
static ɵcmp: i0.ɵɵComponentDeclaration;
}