import { GroupArgument, Entity } from './types';
import { Datasource } from './dataSource';
export declare class Grouping {
    private currentGroups;
    private groupingConfig;
    private expandedGroupIDs;
    constructor();
    reset(): void;
    group(arrayToGroup: Entity[], groupingConfig: GroupArgument[], keepExpanded: boolean, ds: Datasource): Entity[];
    getExpanded(): string[];
    setExpanded(x: string[]): void;
    getGrouping(): GroupArgument[];
    setGrouping(groupingConfig: GroupArgument[]): void;
    private toUppercase;
    expandOneOrAll(id: string, array?: Set<string>): Entity[];
    collapseOneOrAll(id?: string): Entity[];
    private createMainGrouping;
    private groupChildren;
}
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