import { IgCollection } from "igniteui-react-core";
import { SyncableObservableCollection$2 } from "igniteui-react-core";
export declare class IgrIndexCollection extends IgCollection<number, number> {
    constructor(list?: number[]);
    protected _ensureOuter(item: any): number;
    protected _createInnerColl(): SyncableObservableCollection$2<number, number>;
}